implement crnn, make BasePtlModel base class

datasets/shared_data_utils.py

+import os
+import getpass
+
+hostname = os.uname()[1]
+username = getpass.getuser()
+
+if hostname == 'rechenknecht1.cp.jku.at':
+    path_data_cache = '/media/rk1/shared/kofta_cached_datasets'
+
+    # midlevel
+    path_midlevel_annotations_dir = '/media/rk1/shared/datasets/midlevel/metadata_annotations'
+    path_midlevel_annotations = '/media/rk1/shared/datasets/midlevel/metadata_annotations/annotations.csv'
+    path_midlevel_audio_dir = '/media/rk1/shared/datasets/midlevel/audio'
+
+    # mtgjamendo
+    path_mtgjamendo_annotations_dir = '/media/rk1/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations'
+    path_mtgjamendo_annotations_train = '/media/rk1/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/train_processed.tsv'
+    path_mtgjamendo_annotations_val = '/media/rk1/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/val_processed.tsv'
+    path_mtgjamendo_annotations_test = '/media/rk1/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/test_processed.tsv'
+    path_mtgjamendo_audio_dir = '/media/rk1/shared/datasets/MTG-Jamendo/MTG-Jamendo_audio'
+
+if hostname == 'rechenknecht2.cp.jku.at':
+    path_data_cache = '/media/rk2/shared/kofta_cached_datasets'
+
+    # midlevel
+    path_midlevel_annotations_dir = '/media/rk2/shared/datasets/midlevel/metadata_annotations'
+    path_midlevel_annotations = '/media/rk2/shared/datasets/midlevel/metadata_annotations/annotations.csv'
+    path_midlevel_audio_dir = '/media/rk2/shared/datasets/midlevel/audio'
+
+    # mtgjamendo
+    path_mtgjamendo_annotations_dir = '/media/rk2/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations'
+    path_mtgjamendo_annotations_train = '/media/rk2/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/train_processed.tsv'
+    path_mtgjamendo_annotations_val = '/media/rk2/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/validation_processed.tsv'
+    path_mtgjamendo_annotations_test = '/media/rk2/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/test_processed.tsv'
+    path_mtgjamendo_audio_dir = '/media/rk2/shared/datasets/MTG-Jamendo/MTG-Jamendo_audio'
+
+if hostname == 'rechenknecht3.cp.jku.at':
+    path_data_cache = '/media/rk3/shared/kofta_cached_datasets'
+
+    # midlevel
+    path_midlevel_annotations_dir = '/media/rk3/shared/datasets/midlevel/metadata_annotations'
+    path_midlevel_annotations = '/media/rk3/shared/datasets/midlevel/metadata_annotations/annotations.csv'
+    path_midlevel_audio_dir = '/media/rk3/shared/datasets/midlevel/audio'
+
+    # mtgjamendo
+    path_mtgjamendo_annotations_dir = '/media/rk3/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations'
+    path_mtgjamendo_annotations_train = '/media/rk3/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/train_processed.tsv'
+    path_mtgjamendo_annotations_val = '/media/rk3/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/validation_processed.tsv'
+    path_mtgjamendo_annotations_test = '/media/rk3/shared/datasets/MTG-Jamendo/MTG-Jamendo_annotations/test_processed.tsv'
+    path_mtgjamendo_audio_dir = '/media/rk3/shared/datasets/MTG-Jamendo/MTG-Jamendo_audio'
+
+if hostname == 'shreyan-All-Series':
+    path_data_cache = '/mnt/2tb/datasets/data_caches'
+
+    # midlevel
+    path_midlevel_annotations_dir = '/mnt/2tb/datasets/MidlevelFeatures/metadata_annotations'
+    path_midlevel_annotations = '/mnt/2tb/datasets/MidlevelFeatures/metadata_annotations/annotations.csv'
+    path_midlevel_audio_dir = '/mnt/2tb/datasets/MidlevelFeatures/audio'
+
+    # mtgjamendo
+    path_mtgjamendo_annotations_dir = '/mnt/2tb/datasets/MTG-Jamendo/MTG-Jamendo_annotations'
+    path_mtgjamendo_annotations_train = '/mnt/2tb/datasets/MTG-Jamendo/MTG-Jamendo_annotations/train_processed.tsv'
+    path_mtgjamendo_annotations_val = '/mnt/2tb/datasets/MTG-Jamendo/MTG-Jamendo_annotations/validation_processed.tsv'
+    path_mtgjamendo_annotations_test = '/mnt/2tb/datasets/MTG-Jamendo/MTG-Jamendo_annotations/test_processed.tsv'
+    path_mtgjamendo_audio_dir = '/mnt/2tb/datasets/MTG-Jamendo/MTG-Jamendo_audio'
+
+if hostname not in ['rechenknecht1.cp.jku.at', 'rechenknecht2.cp.jku.at', 'rechenknecht3.cp.jku.at', 'shreyan-All-Series']:
+    raise Exception(f"Paths not defined for {hostname}")
\ No newline at end of file

experiments/experiment_baseline.py

@@ -83,8 +83,9 @@ def run(hparams):
                           experiment=exp, max_nb_epochs=config['epochs'], train_percent_check=hparams.train_percent,
                           fast_dev_run=False,
                           early_stop_callback=early_stop,
-                          checkpoint_callback=checkpoint_callback
-    )
+                          checkpoint_callback=checkpoint_callback,
+                          nb_sanity_val_steps=0)  # don't run sanity validation run
+
     else:
         trainer = Trainer(experiment=exp, max_nb_epochs=1, train_percent_check=0.01,
                           fast_dev_run=True)

experiments/experiment_crnn.py

+from utils import USE_GPU, init_experiment
+from pytorch_lightning import Trainer
+from pytorch_lightning.callbacks import EarlyStopping, ModelCheckpoint
+from test_tube import Experiment, HyperOptArgumentParser
+from models.crnn import CRNN as Network
+import os
+
+model_config = {
+    'data_source':'mtgjamendo',
+    'validation_metrics':['rocauc', 'prauc'],
+    'test_metrics':['rocauc', 'prauc']
+}
+
+initialized = False # TODO: Find a better way to do this
+
+def run(hparams):
+    if not initialized:
+        init_experiment(comment=hparams.experiment_name)
+    from utils import CURR_RUN_PATH, logger  # import these after init_experiment
+    logger.info(f"tensorboard --logdir={CURR_RUN_PATH}")
+
+    logger.info(hparams)
+
+    exp = Experiment(save_dir=CURR_RUN_PATH)
+
+    # callbacks
+    early_stop = EarlyStopping(
+        monitor='val_loss',
+        patience=20,
+        verbose=True,
+        mode='min'
+    )
+
+    checkpoint_callback = ModelCheckpoint(
+        filepath=os.path.join(CURR_RUN_PATH, 'best.ckpt'),
+        save_best_only=True,
+        verbose=True,
+        monitor='val_loss',
+        mode='min'
+    )
+
+    if USE_GPU:
+        trainer = Trainer(gpus=[0], distributed_backend=None,
+                          experiment=exp, max_nb_epochs=hparams.max_epochs,
+                          train_percent_check=hparams.train_percent,
+                          fast_dev_run=False, early_stop_callback=early_stop,
+                          checkpoint_callback=checkpoint_callback,
+                          nb_sanity_val_steps=0) # don't run sanity validation run
+    else:
+        trainer = Trainer(experiment=exp, max_nb_epochs=1, train_percent_check=0.1,
+                          fast_dev_run=True)
+
+    model = Network(num_class=56, config=model_config, hparams=hparams)
+
+    print(model)
+    trainer.fit(model)
+    trainer.test()
+
+
+if __name__=='__main__':
+    parent_parser = HyperOptArgumentParser(strategy='grid_search', add_help=False)
+    parent_parser.add_argument('--experiment_name', type=str,
+                               default='pt_lightning_exp_a', help='test tube exp name')
+    parent_parser.add_argument('--train_percent', type=float,
+                               default=1.0, help='how much train data to use')
+    parent_parser.add_argument('--max_epochs', type=int,
+                               default=10, help='maximum number of epochs')
+    #parent_parser.add_argument('--gpus', type=list, default=[0,1],
+    #                           help='how many gpus to use in the node.'
+    #                                ' value -1 uses all the gpus on the node')
+    parser = Network.add_model_specific_args(parent_parser)
+    hyperparams = parser.parse_args()
+    # run(hyperparams)
+    #gpus = ['cuda:0', 'cuda:1']
+    #hyperparams.optimize_parallel_gpu(run, gpus, 5)
+    for hparam_trial in hyperparams.trials(20):
+        run(hparam_trial)

experiments/experiment_midlevel.py

@@ -47,25 +47,9 @@ def pretrain_midlevel(hparams):
     logger.info(f"tensorboard --logdir={CURR_RUN_PATH}")
     exp = Experiment(name='midlevel', save_dir=CURR_RUN_PATH)
 
-    def setup_config():
-        def print_config():
-            global config
-            st = '---------CONFIG--------\n'
-            for k in config.keys():
-                st += k+':'+str(config.get(k))+'\n'
-            return st
-
-        conf = hparams.config
-        if conf is not None:
-            conf_func = globals()[conf]
-            try:
-                conf_func()
-            except:
-                logger.error(f"Config {conf} not defined")
-
-        logger.info(print_config())
-
-    setup_config()
+    midlevel_configs()
+    logger.info(print_config())
+
 
     early_stop = EarlyStopping(
         monitor=config['earlystopping_metric'],

griffin_lim.py

+
+import math
+import sys
+import time
+import numpy as np
+import wave
+import scipy
+import scipy.signal
+from pylab import *
+import array
+import os
+from os.path import expanduser
+import scipy.io.wavfile
+
+# Author: Brian K. Vogel
+# brian.vogel@gmail.com
+
+
+def hz_to_mel(f_hz):
+    """Convert Hz to mel scale.
+    This uses the formula from O'Shaugnessy's book.
+    Args:
+        f_hz (float): The value in Hz.
+    Returns:
+        The value in mels.
+    """
+    return 2595*np.log10(1.0 + f_hz/700.0)
+
+
+def mel_to_hz(m_mel):
+    """Convert mel scale to Hz.
+    This uses the formula from O'Shaugnessy's book.
+    Args:
+        m_mel (float): The value in mels
+    Returns:
+        The value in Hz
+    """
+    return 700*(10**(m_mel/2595) - 1.0)
+
+
+def fft_bin_to_hz(n_bin, sample_rate_hz, fft_size):
+    """Convert FFT bin index to frequency in Hz.
+    Args:
+        n_bin (int or float): The FFT bin index.
+        sample_rate_hz (int or float): The sample rate in Hz.
+        fft_size (int or float): The FFT size.
+    Returns:
+        The value in Hz.
+    """
+    n_bin = float(n_bin)
+    sample_rate_hz = float(sample_rate_hz)
+    fft_size = float(fft_size)
+    return n_bin*sample_rate_hz/(2.0*fft_size)
+
+
+def hz_to_fft_bin(f_hz, sample_rate_hz, fft_size):
+    """Convert frequency in Hz to FFT bin index.
+    Args:
+        f_hz (int or float): The frequency in Hz.
+        sample_rate_hz (int or float): The sample rate in Hz.
+        fft_size (int or float): The FFT size.
+    Returns:
+        The FFT bin index as an int.
+    """
+    f_hz = float(f_hz)
+    sample_rate_hz = float(sample_rate_hz)
+    fft_size = float(fft_size)
+    fft_bin = int(np.round((f_hz*2.0*fft_size/sample_rate_hz)))
+    if fft_bin >= fft_size:
+        fft_bin = fft_size-1
+    return fft_bin
+
+
+def make_mel_filterbank(min_freq_hz, max_freq_hz, mel_bin_count,
+                        linear_bin_count, sample_rate_hz):
+    """Create a mel filterbank matrix.
+    Create and return a mel filterbank matrix `filterbank` of shape (`mel_bin_count`,
+    `linear_bin_couont`). The `filterbank` matrix can be used to transform a
+    (linear scale) spectrum or spectrogram into a mel scale spectrum or
+    spectrogram as follows:
+    `mel_scale_spectrum` = `filterbank`*'linear_scale_spectrum'
+    where linear_scale_spectrum' is a shape (`linear_bin_count`, `m`) and
+    `mel_scale_spectrum` is shape ('mel_bin_count', `m`) where `m` is the number
+    of spectral time slices.
+    Likewise, the reverse-direction transform can be performed as:
+    'linear_scale_spectrum' = filterbank.T`*`mel_scale_spectrum`
+    Note that the process of converting to mel scale and then back to linear
+    scale is lossy.
+    This function computes the mel-spaced filters such that each filter is triangular
+    (in linear frequency) with response 1 at the center frequency and decreases linearly
+    to 0 upon reaching an adjacent filter's center frequency. Note that any two adjacent
+    filters will overlap having a response of 0.5 at the mean frequency of their
+    respective center frequencies.
+    Args:
+        min_freq_hz (float): The frequency in Hz corresponding to the lowest
+            mel scale bin.
+        max_freq_hz (flloat): The frequency in Hz corresponding to the highest
+            mel scale bin.
+        mel_bin_count (int): The number of mel scale bins.
+        linear_bin_count (int): The number of linear scale (fft) bins.
+        sample_rate_hz (float): The sample rate in Hz.
+    Returns:
+        The mel filterbank matrix as an 2-dim Numpy array.
+    """
+    min_mels = hz_to_mel(min_freq_hz)
+    max_mels = hz_to_mel(max_freq_hz)
+    # Create mel_bin_count linearly spaced values between these extreme mel values.
+    mel_lin_spaced = np.linspace(min_mels, max_mels, num=mel_bin_count)
+    # Map each of these mel values back into linear frequency (Hz).
+    center_frequencies_hz = np.array([mel_to_hz(n) for n in mel_lin_spaced])
+    mels_per_bin = float(max_mels - min_mels)/float(mel_bin_count - 1)
+    mels_start = min_mels - mels_per_bin
+    hz_start = mel_to_hz(mels_start)
+    fft_bin_start = hz_to_fft_bin(hz_start, sample_rate_hz, linear_bin_count)
+    #print('fft_bin_start: ', fft_bin_start)
+    mels_end = max_mels + mels_per_bin
+    hz_stop = mel_to_hz(mels_end)
+    fft_bin_stop = hz_to_fft_bin(hz_stop, sample_rate_hz, linear_bin_count)
+    #print('fft_bin_stop: ', fft_bin_stop)
+    # Map each center frequency to the closest fft bin index.
+    linear_bin_indices = np.array([hz_to_fft_bin(f_hz, sample_rate_hz, linear_bin_count) for f_hz in center_frequencies_hz])
+    # Create filterbank matrix.
+    filterbank = np.zeros((mel_bin_count, linear_bin_count))
+    for mel_bin in range(mel_bin_count):
+        center_freq_linear_bin = linear_bin_indices[mel_bin]
+        # Create a triangular filter having the current center freq.
+        # The filter will start with 0 response at left_bin (if it exists)
+        # and ramp up to 1.0 at center_freq_linear_bin, and then ramp
+        # back down to 0 response at right_bin (if it exists).
+
+        # Create the left side of the triangular filter that ramps up
+        # from 0 to a response of 1 at the center frequency.
+        if center_freq_linear_bin > 1:
+            # It is possible to create the left triangular filter.
+            if mel_bin == 0:
+                # Since this is the first center frequency, the left side
+                # must start ramping up from linear bin 0 or 1 mel bin before the center freq.
+                left_bin = max(0, fft_bin_start)
+            else:
+                # Start ramping up from the previous center frequency bin.
+                left_bin = linear_bin_indices[mel_bin - 1]
+            for f_bin in range(left_bin, center_freq_linear_bin+1):
+                if (center_freq_linear_bin - left_bin) > 0:
+                    response = float(f_bin - left_bin)/float(center_freq_linear_bin - left_bin)
+                    filterbank[mel_bin, f_bin] = response
+        # Create the right side of the triangular filter that ramps down
+        # from 1 to 0.
+        if center_freq_linear_bin < linear_bin_count-2:
+            # It is possible to create the right triangular filter.
+            if mel_bin == mel_bin_count - 1:
+                # Since this is the last mel bin, we must ramp down to response of 0
+                # at the last linear freq bin.
+                right_bin = min(linear_bin_count - 1, fft_bin_stop)
+            else:
+                right_bin = linear_bin_indices[mel_bin + 1]
+            for f_bin in range(center_freq_linear_bin, right_bin+1):
+                if (right_bin - center_freq_linear_bin) > 0:
+                    response = float(right_bin - f_bin)/float(right_bin - center_freq_linear_bin)
+                    filterbank[mel_bin, f_bin] = response
+        filterbank[mel_bin, center_freq_linear_bin] = 1.0
+
+    return  filterbank
+
+
+def stft_for_reconstruction(x, fft_size, hopsamp):
+    """Compute and return the STFT of the supplied time domain signal x.
+    Args:
+        x (1-dim Numpy array): A time domain signal.
+        fft_size (int): FFT size. Should be a power of 2, otherwise DFT will be used.
+        hopsamp (int):
+    Returns:
+        The STFT. The rows are the time slices and columns are the frequency bins.
+    """
+    window = np.hanning(fft_size)
+    fft_size = int(fft_size)
+    hopsamp = int(hopsamp)
+    return np.array([np.fft.rfft(window*x[i:i+fft_size])
+                     for i in range(0, len(x)-fft_size, hopsamp)])
+
+
+def istft_for_reconstruction(X, fft_size, hopsamp):
+    """Invert a STFT into a time domain signal.
+    Args:
+        X (2-dim Numpy array): Input spectrogram. The rows are the time slices and columns are the frequency bins.
+        fft_size (int):
+        hopsamp (int): The hop size, in samples.
+    Returns:
+        The inverse STFT.
+    """
+    fft_size = int(fft_size)
+    hopsamp = int(hopsamp)
+    window = np.hanning(fft_size)
+    time_slices = X.shape[0]
+    len_samples = int(time_slices*hopsamp + fft_size)
+    x = np.zeros(len_samples)
+    for n,i in enumerate(range(0, len(x)-fft_size, hopsamp)):
+        x[i:i+fft_size] += window*np.real(np.fft.irfft(X[n]))
+    return x
+
+
+def get_signal(in_file, expected_fs=44100):
+    """Load a wav file.
+    If the file contains more than one channel, return a mono file by taking
+    the mean of all channels.
+    If the sample rate differs from the expected sample rate (default is 44100 Hz),
+    raise an exception.
+    Args:
+        in_file: The input wav file, which should have a sample rate of `expected_fs`.
+        expected_fs (int): The expected sample rate of the input wav file.
+    Returns:
+        The audio siganl as a 1-dim Numpy array. The values will be in the range [-1.0, 1.0]. fixme ( not yet)
+    """
+    fs, y = scipy.io.wavfile.read(in_file)
+    num_type = y[0].dtype
+    if num_type == 'int16':
+        y = y*(1.0/32768)
+    elif num_type == 'int32':
+        y = y*(1.0/2147483648)
+    elif num_type == 'float32':
+        # Nothing to do
+        pass
+    elif num_type == 'uint8':
+        raise Exception('8-bit PCM is not supported.')
+    else:
+        raise Exception('Unknown format.')
+    if fs != expected_fs:
+        raise Exception('Invalid sample rate.')
+    if y.ndim == 1:
+        return y
+    else:
+        return y.mean(axis=1)
+
+
+def reconstruct_signal_griffin_lim(magnitude_spectrogram, fft_size, hopsamp, iterations):
+    """Reconstruct an audio signal from a magnitude spectrogram.
+    Given a magnitude spectrogram as input, reconstruct
+    the audio signal and return it using the Griffin-Lim algorithm from the paper:
+    "Signal estimation from modified short-time fourier transform" by Griffin and Lim,
+    in IEEE transactions on Acoustics, Speech, and Signal Processing. Vol ASSP-32, No. 2, April 1984.
+    Args:
+        magnitude_spectrogram (2-dim Numpy array): The magnitude spectrogram. The rows correspond to the time slices
+            and the columns correspond to frequency bins.
+        fft_size (int): The FFT size, which should be a power of 2.
+        hopsamp (int): The hope size in samples.
+        iterations (int): Number of iterations for the Griffin-Lim algorithm. Typically a few hundred
+            is sufficient.
+    Returns:
+        The reconstructed time domain signal as a 1-dim Numpy array.
+    """
+    time_slices = magnitude_spectrogram.shape[0]
+    len_samples = int(time_slices*hopsamp + fft_size)
+    # Initialize the reconstructed signal to noise.
+    x_reconstruct = np.random.randn(len_samples)
+    n = iterations # number of iterations of Griffin-Lim algorithm.
+    while n > 0:
+        n -= 1
+        reconstruction_spectrogram = stft_for_reconstruction(x_reconstruct, fft_size, hopsamp)
+        reconstruction_angle = np.angle(reconstruction_spectrogram)
+        # Discard magnitude part of the reconstruction and use the supplied magnitude spectrogram instead.
+        proposal_spectrogram = magnitude_spectrogram*np.exp(1.0j*reconstruction_angle)
+        prev_x = x_reconstruct
+        x_reconstruct = istft_for_reconstruction(proposal_spectrogram, fft_size, hopsamp)
+        diff = sqrt(sum((x_reconstruct - prev_x)**2)/x_reconstruct.size)
+        print('Reconstruction iteration: {}/{} RMSE: {} '.format(iterations - n, iterations, diff))
+    return x_reconstruct
+
+
+def save_audio_to_file(x, sample_rate, outfile='out.wav'):
+    """Save a mono signal to a file.
+    Args:
+        x (1-dim Numpy array): The audio signal to save. The signal values should be in the range [-1.0, 1.0].
+        sample_rate (int): The sample rate of the signal, in Hz.
+        outfile: Name of the file to save.
+    """
+    x_max = np.max(abs(x))
+    assert x_max <= 1.0, 'Input audio value is out of range. Should be in the range [-1.0, 1.0].'
+    x = x*32767.0
+    data = array.array('h')
+    for i in range(len(x)):
+        cur_samp = int(round(x[i]))
+        data.append(cur_samp)
+    f = wave.open(outfile, 'w')
+    f.setparams((1, 2, sample_rate, 0, "NONE", "Uncompressed"))
+    f.writeframes(data.tostring())
+    f.close()
\ No newline at end of file

models/baseline.py

 from utils import *
 import pytorch_lightning as pl
-
 from models.shared_stuff import *
-
 from sklearn import metrics
 
 # TODO pr-auc
@@ -87,7 +85,7 @@ class CNN(pl.LightningModule):
 
     def training_step(self, data_batch, batch_nb):
         x, _, y = data_batch
-        y_hat = self.forward_full_song(x, y)
+        y_hat = self.forward(x)
         y = y.float()
         y_hat = y_hat.float()
         return {'loss':self.my_loss(y_hat, y)}

models/crnn.py

+from test_tube import HyperOptArgumentParser
+from utils import *
+from models.shared_stuff import BasePtlModel
+
+class CRNN(BasePtlModel):
+    def __init__(self, config, num_class, hparams):
+        super(CRNN, self).__init__(config, hparams)
+
+        # init bn
+        self.bn_init = nn.BatchNorm2d(1)
+
+        # layer 1
+        self.conv_1 = nn.Conv2d(1, 64, 3, padding=1)
+        self.bn_1 = nn.BatchNorm2d(64)
+        self.mp_1 = nn.MaxPool2d((2, 4))
+
+        # layer 2
+        self.conv_2 = nn.Conv2d(64, 128, 3, padding=1)
+        self.bn_2 = nn.BatchNorm2d(128)
+        self.mp_2 = nn.MaxPool2d((2, 4))
+
+        # layer 3
+        self.conv_3 = nn.Conv2d(128, 128, 3, padding=1)
+        self.bn_3 = nn.BatchNorm2d(128)
+        self.mp_3 = nn.MaxPool2d((2, 4))
+
+        # layer 4
+        self.conv_4 = nn.Conv2d(128, 128, 3, padding=1)
+        self.bn_4 = nn.BatchNorm2d(128)
+        self.mp_4 = nn.MaxPool2d((3, 5))
+
+        # layer 5
+        self.conv_5 = nn.Conv2d(128, 64, 3, padding=1)
+        self.bn_5 = nn.BatchNorm2d(64)
+        self.mp_5 = nn.MaxPool2d((4, 4))
+
+        # recurrent layer
+        self.gru1 = nn.GRU(input_size=32,
+                           hidden_size=hparams.gru_hidden_size,
+                           num_layers=hparams.gru_num_layers)
+
+        # classifier
+        self.dense = nn.Linear(hparams.gru_hidden_size, num_class)
+        self.dropout = nn.Dropout(self.hparams.drop_prob)
+
+
+    def forward(self, x):
+        x = x[:, :, :, :512]
+        # init bn
+        x = self.bn_init(x)
+
+        # layer 1
+        x = self.mp_1(nn.ELU()(self.bn_1(self.conv_1(x))))
+
+        # layer 2
+        x = nn.ELU()(self.bn_2(self.conv_2(x)))
+        # x = self.mp_2(nn.ELU()(self.bn_2(self.conv_2(x))))
+
+        # layer 3
+        x = self.mp_3(nn.ELU()(self.bn_3(self.conv_3(x))))
+
+        # layer 4
+        x = self.mp_4(nn.ELU()(self.bn_4(self.conv_4(x))))
+
+        # layer 5
+        x = self.mp_5(nn.ELU()(self.bn_5(self.conv_5(x))))
+
+        # classifier
+        x = x.view(-1, x.size(0), 32)
+
+        x = self.gru1(x)[1][1] # TODO: Check if this is correct
+
+        x = self.dropout(x)
+        logit = nn.Sigmoid()(self.dense(x))
+
+        return logit
+
+    @staticmethod
+    def add_model_specific_args(parent_parser):
+        """Parameters defined here will be available to your model through self.hparams
+        """
+        parser = HyperOptArgumentParser(strategy=parent_parser.strategy, parents=[parent_parser])
+
+        # network params
+        parser.add_argument('--gru_hidden_size', default=320, type=int)
+        parser.add_argument('--gru_num_layers', default=2, type=int)
+        parser.opt_list('--drop_prob', default=0.2, options=[0.2, 0.5], type=float, tunable=True)
+        parser.opt_list('--learning_rate', default=0.0001, type=float,
+                        options=[0.00001, 0.0005, 0.001],
+                        tunable=True)
+
+
+        # training params (opt)
+        parser.opt_list('--optimizer_name', default='adam', type=str,
+                        options=['adam'], tunable=False)
+
+        # if using 2 nodes with 4 gpus each the batch size here
+        #  (256) will be 256 / (2*8) = 16 per gpu
+        parser.opt_list('--batch_size', default=32, type=int,
+                        options=[32, 64, 128, 256], tunable=False,
+                        help='batch size will be divided over all gpus being used across all nodes')
+        return parser

models/shared_stuff.py

+from datasets.midlevel import df_get_midlevel_set
+from torch import optim
+from torch.utils.data.dataset import random_split
 from utils import PATH_ANNOTATIONS, PATH_AUDIO
 import torch
 import torch.nn.functional as F
@@ -6,6 +9,8 @@ from sklearn import metrics
 import os
 from datasets.mtgjamendo import df_get_mtg_set
 import numpy as np
+import pytorch_lightning as pl
+from datasets.shared_data_utils import *
 
 def my_loss(y_hat, y):
     return F.binary_cross_entropy(y_hat, y)
@@ -141,4 +146,210 @@ def test_dataloader(batch_size=32):
     dataset = df_get_mtg_set('mtgjamendo_test', test_csv, PATH_AUDIO, cache_x_name)
     return DataLoader(dataset=dataset,
                       batch_size=batch_size,
-                      shuffle=True)
\ No newline at end of file