The Pop2Piano model was proposed in Pop2Piano : Pop Audio-based Piano Cover Generation by Jongho Choi and Kyogu Lee.
Piano covers of pop music are widely enjoyed, but generating them from music is not a trivial task. It requires great expertise with playing piano as well as knowing different characteristics and melodies of a song. With Pop2Piano you can directly generate a cover from a song’s audio waveform. It is the first model to directly generate a piano cover from pop audio without melody and chord extraction modules.
Pop2Piano is an encoder-decoder Transformer model based on T5. The input audio is transformed to its waveform and passed to the encoder, which transforms it to a latent representation. The decoder uses these latent representations to generate token ids in an autoregressive way. Each token id corresponds to one of four different token types: time, velocity, note and ‘special’. The token ids are then decoded to their equivalent MIDI file.
The abstract from the paper is the following:
Piano covers of pop music are enjoyed by many people. However, the task of automatically generating piano covers of pop music is still understudied. This is partly due to the lack of synchronized {Pop, Piano Cover} data pairs, which made it challenging to apply the latest data-intensive deep learning-based methods. To leverage the power of the data-driven approach, we make a large amount of paired and synchronized {Pop, Piano Cover} data using an automated pipeline. In this paper, we present Pop2Piano, a Transformer network that generates piano covers given waveforms of pop music. To the best of our knowledge, this is the first model to generate a piano cover directly from pop audio without using melody and chord extraction modules. We show that Pop2Piano, trained with our dataset, is capable of producing plausible piano covers.
This model was contributed by Susnato Dhar. The original code can be found here.
pip install pretty-midi==0.2.9 essentia==2.1b6.dev1034 librosa scipy
Please note that you may need to restart your runtime after installation.
Pop2PianoForConditionalGeneration.generate()
can lead to variety of different results.>>> from datasets import load_dataset
>>> from transformers import Pop2PianoForConditionalGeneration, Pop2PianoProcessor
>>> model = Pop2PianoForConditionalGeneration.from_pretrained("sweetcocoa/pop2piano")
>>> processor = Pop2PianoProcessor.from_pretrained("sweetcocoa/pop2piano")
>>> ds = load_dataset("sweetcocoa/pop2piano_ci", split="test")
>>> inputs = processor(
... audio=ds["audio"][0]["array"], sampling_rate=ds["audio"][0]["sampling_rate"], return_tensors="pt"
... )
>>> model_output = model.generate(input_features=inputs["input_features"], composer="composer1")
>>> tokenizer_output = processor.batch_decode(
... token_ids=model_output, feature_extractor_output=inputs
... )["pretty_midi_objects"][0]
>>> tokenizer_output.write("./Outputs/midi_output.mid")
>>> import librosa
>>> from transformers import Pop2PianoForConditionalGeneration, Pop2PianoProcessor
>>> audio, sr = librosa.load("<your_audio_file_here>", sr=44100) # feel free to change the sr to a suitable value.
>>> model = Pop2PianoForConditionalGeneration.from_pretrained("sweetcocoa/pop2piano")
>>> processor = Pop2PianoProcessor.from_pretrained("sweetcocoa/pop2piano")
>>> inputs = processor(audio=audio, sampling_rate=sr, return_tensors="pt")
>>> model_output = model.generate(input_features=inputs["input_features"], composer="composer1")
>>> tokenizer_output = processor.batch_decode(
... token_ids=model_output, feature_extractor_output=inputs
... )["pretty_midi_objects"][0]
>>> tokenizer_output.write("./Outputs/midi_output.mid")
>>> import librosa
>>> from transformers import Pop2PianoForConditionalGeneration, Pop2PianoProcessor
>>> # feel free to change the sr to a suitable value.
>>> audio1, sr1 = librosa.load("<your_first_audio_file_here>", sr=44100)
>>> audio2, sr2 = librosa.load("<your_second_audio_file_here>", sr=44100)
>>> model = Pop2PianoForConditionalGeneration.from_pretrained("sweetcocoa/pop2piano")
>>> processor = Pop2PianoProcessor.from_pretrained("sweetcocoa/pop2piano")
>>> inputs = processor(audio=[audio1, audio2], sampling_rate=[sr1, sr2], return_attention_mask=True, return_tensors="pt")
>>> # Since we now generating in batch(2 audios) we must pass the attention_mask
>>> model_output = model.generate(
... input_features=inputs["input_features"],
... attention_mask=inputs["attention_mask"],
... composer="composer1",
... )
>>> tokenizer_output = processor.batch_decode(
... token_ids=model_output, feature_extractor_output=inputs
... )["pretty_midi_objects"]
>>> # Since we now have 2 generated MIDI files
>>> tokenizer_output[0].write("./Outputs/midi_output1.mid")
>>> tokenizer_output[1].write("./Outputs/midi_output2.mid")
Pop2PianoFeatureExtractor
and Pop2PianoTokenizer
):>>> import librosa
>>> from transformers import Pop2PianoForConditionalGeneration, Pop2PianoFeatureExtractor, Pop2PianoTokenizer
>>> # feel free to change the sr to a suitable value.
>>> audio1, sr1 = librosa.load("<your_first_audio_file_here>", sr=44100)
>>> audio2, sr2 = librosa.load("<your_second_audio_file_here>", sr=44100)
>>> model = Pop2PianoForConditionalGeneration.from_pretrained("sweetcocoa/pop2piano")
>>> feature_extractor = Pop2PianoFeatureExtractor.from_pretrained("sweetcocoa/pop2piano")
>>> tokenizer = Pop2PianoTokenizer.from_pretrained("sweetcocoa/pop2piano")
>>> inputs = feature_extractor(
... audio=[audio1, audio2],
... sampling_rate=[sr1, sr2],
... return_attention_mask=True,
... return_tensors="pt",
... )
>>> # Since we now generating in batch(2 audios) we must pass the attention_mask
>>> model_output = model.generate(
... input_features=inputs["input_features"],
... attention_mask=inputs["attention_mask"],
... composer="composer1",
... )
>>> tokenizer_output = tokenizer.batch_decode(
... token_ids=model_output, feature_extractor_output=inputs
... )["pretty_midi_objects"]
>>> # Since we now have 2 generated MIDI files
>>> tokenizer_output[0].write("./Outputs/midi_output1.mid")
>>> tokenizer_output[1].write("./Outputs/midi_output2.mid")
( vocab_size = 2400 composer_vocab_size = 21 d_model = 512 d_kv = 64 d_ff = 2048 num_layers = 6 num_decoder_layers = None num_heads = 8 relative_attention_num_buckets = 32 relative_attention_max_distance = 128 dropout_rate = 0.1 layer_norm_epsilon = 1e-06 initializer_factor = 1.0 feed_forward_proj = 'gated-gelu' is_encoder_decoder = True use_cache = True pad_token_id = 0 eos_token_id = 1 dense_act_fn = 'relu' **kwargs )
Parameters
int
, optional, defaults to 2400) —
Vocabulary size of the Pop2PianoForConditionalGeneration
model. Defines the number of different tokens
that can be represented by the inputs_ids
passed when calling Pop2PianoForConditionalGeneration. int
, optional, defaults to 21) —
Denotes the number of composers. int
, optional, defaults to 512) —
Size of the encoder layers and the pooler layer. int
, optional, defaults to 64) —
Size of the key, query, value projections per attention head. The inner_dim
of the projection layer will
be defined as num_heads * d_kv
. int
, optional, defaults to 2048) —
Size of the intermediate feed forward layer in each Pop2PianoBlock
. int
, optional, defaults to 6) —
Number of hidden layers in the Transformer encoder. int
, optional) —
Number of hidden layers in the Transformer decoder. Will use the same value as num_layers
if not set. int
, optional, defaults to 8) —
Number of attention heads for each attention layer in the Transformer encoder. int
, optional, defaults to 32) —
The number of buckets to use for each attention layer. int
, optional, defaults to 128) —
The maximum distance of the longer sequences for the bucket separation. float
, optional, defaults to 0.1) —
The ratio for all dropout layers. float
, optional, defaults to 1e-6) —
The epsilon used by the layer normalization layers. float
, optional, defaults to 1.0) —
A factor for initializing all weight matrices (should be kept to 1.0, used internally for initialization
testing). string
, optional, defaults to "gated-gelu"
) —
Type of feed forward layer to be used. Should be one of "relu"
or "gated-gelu"
. bool
, optional, defaults to True
) —
Whether or not the model should return the last key/values attentions (not used by all models). string
, optional, defaults to "relu"
) —
Type of Activation Function to be used in Pop2PianoDenseActDense
and in Pop2PianoDenseGatedActDense
. This is the configuration class to store the configuration of a Pop2PianoForConditionalGeneration. It is used to instantiate a Pop2PianoForConditionalGeneration model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the Pop2Piano sweetcocoa/pop2piano architecture.
Configuration objects inherit from PretrainedConfig and can be used to control the model outputs. Read the documentation from PretrainedConfig for more information.
( config: Pop2PianoConfig )
Parameters
Pop2Piano Model with a language modeling
head on top.
This model inherits from PreTrainedModel. Check the superclass documentation for the generic methods the
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
etc.)
This model is also a PyTorch torch.nn.Module subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.
( input_ids: Optional = None attention_mask: Optional = None decoder_input_ids: Optional = None decoder_attention_mask: Optional = None head_mask: Optional = None decoder_head_mask: Optional = None cross_attn_head_mask: Optional = None encoder_outputs: Optional = None past_key_values: Optional = None inputs_embeds: Optional = None input_features: Optional = None decoder_inputs_embeds: Optional = None labels: Optional = None use_cache: Optional = None output_attentions: Optional = None output_hidden_states: Optional = None return_dict: Optional = None ) → transformers.modeling_outputs.Seq2SeqLMOutput or tuple(torch.FloatTensor)
Parameters
torch.LongTensor
of shape (batch_size, sequence_length)
) —
Indices of input sequence tokens in the vocabulary. Pop2Piano is a model with relative position embeddings
so you should be able to pad the inputs on both the right and the left. Indices can be obtained using
AutoTokenizer. See PreTrainedTokenizer.encode() and PreTrainedTokenizer.call() for detail.
What are input IDs? To know more on how to prepare input_ids
for pretraining
take a look a Pop2Pianp Training. torch.FloatTensor
of shape (batch_size, sequence_length)
, optional) —
Mask to avoid performing attention on padding token indices. Mask values selected in [0, 1]
:
torch.LongTensor
of shape (batch_size, target_sequence_length)
, optional) —
Indices of decoder input sequence tokens in the vocabulary. Indices can be obtained using
AutoTokenizer. See PreTrainedTokenizer.encode() and PreTrainedTokenizer.call() for details.
What are decoder input IDs? Pop2Piano uses the pad_token_id
as the
starting token for decoder_input_ids
generation. If past_key_values
is used, optionally only the last
decoder_input_ids
have to be input (see past_key_values
). To know more on how to prepare torch.BoolTensor
of shape (batch_size, target_sequence_length)
, optional) —
Default behavior: generate a tensor that ignores pad tokens in decoder_input_ids
. Causal mask will also
be used by default. torch.FloatTensor
of shape (num_heads,)
or (num_layers, num_heads)
, optional) —
Mask to nullify selected heads of the self-attention modules in the encoder. Mask values selected in [0, 1]
:
torch.FloatTensor
of shape (num_heads,)
or (num_layers, num_heads)
, optional) —
Mask to nullify selected heads of the self-attention modules in the decoder. Mask values selected in [0, 1]
:
torch.Tensor
of shape (num_heads,)
or (num_layers, num_heads)
, optional) —
Mask to nullify selected heads of the cross-attention modules in the decoder. Mask values selected in
[0, 1]
:
tuple(tuple(torch.FloatTensor)
, optional) —
Tuple consists of (last_hidden_state
, optional
: hidden_states, optional
: attentions)
last_hidden_state
of shape (batch_size, sequence_length, hidden_size)
is a sequence of hidden states at
the output of the last layer of the encoder. Used in the cross-attention of the decoder. tuple(tuple(torch.FloatTensor))
of length config.n_layers
with each tuple having 4 tensors of shape (batch_size, num_heads, sequence_length - 1, embed_size_per_head)
) —
Contains precomputed key and value hidden states of the attention blocks. Can be used to speed up decoding.
If past_key_values
are used, the user can optionally input only the last decoder_input_ids
(those that
don’t have their past key value states given to this model) of shape (batch_size, 1)
instead of all
decoder_input_ids
of shape (batch_size, sequence_length)
. torch.FloatTensor
of shape (batch_size, sequence_length, hidden_size)
, optional) —
Optionally, instead of passing input_ids
you can choose to directly pass an embedded representation. This
is useful if you want more control over how to convert input_ids
indices into associated vectors than the
model’s internal embedding lookup matrix. torch.FloatTensor
of shape (batch_size, sequence_length, hidden_size)
, optional) —
Does the same task as inputs_embeds
. If inputs_embeds
is not present but input_features
is present
then input_features
will be considered as inputs_embeds
. torch.FloatTensor
of shape (batch_size, target_sequence_length, hidden_size)
, optional) —
Optionally, instead of passing decoder_input_ids
you can choose to directly pass an embedded
representation. If past_key_values
is used, optionally only the last decoder_inputs_embeds
have to be
input (see past_key_values
). This is useful if you want more control over how to convert
decoder_input_ids
indices into associated vectors than the model’s internal embedding lookup matrix. If
decoder_input_ids
and decoder_inputs_embeds
are both unset, decoder_inputs_embeds
takes the value of
inputs_embeds
. bool
, optional) —
If set to True
, past_key_values
key value states are returned and can be used to speed up decoding (see
past_key_values
). bool
, optional) —
Whether or not to return the attentions tensors of all attention layers. See attentions
under returned
tensors for more detail. bool
, optional) —
Whether or not to return the hidden states of all layers. See hidden_states
under returned tensors for
more detail. bool
, optional) —
Whether or not to return a ModelOutput instead of a plain tuple. torch.LongTensor
of shape (batch_size,)
, optional) —
Labels for computing the sequence classification/regression loss. Indices should be in [-100, 0, ..., config.vocab_size - 1]
. All labels set to -100
are ignored (masked), the loss is only computed for
labels in [0, ..., config.vocab_size]
Returns
transformers.modeling_outputs.Seq2SeqLMOutput or tuple(torch.FloatTensor)
A transformers.modeling_outputs.Seq2SeqLMOutput or a tuple of
torch.FloatTensor
(if return_dict=False
is passed or when config.return_dict=False
) comprising various
elements depending on the configuration (Pop2PianoConfig) and inputs.
loss (torch.FloatTensor
of shape (1,)
, optional, returned when labels
is provided) — Language modeling loss.
logits (torch.FloatTensor
of shape (batch_size, sequence_length, config.vocab_size)
) — Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
past_key_values (tuple(tuple(torch.FloatTensor))
, optional, returned when use_cache=True
is passed or when config.use_cache=True
) — Tuple of tuple(torch.FloatTensor)
of length config.n_layers
, with each tuple having 2 tensors of shape
(batch_size, num_heads, sequence_length, embed_size_per_head)
) and 2 additional tensors of shape
(batch_size, num_heads, encoder_sequence_length, embed_size_per_head)
.
Contains pre-computed hidden-states (key and values in the self-attention blocks and in the cross-attention
blocks) that can be used (see past_key_values
input) to speed up sequential decoding.
decoder_hidden_states (tuple(torch.FloatTensor)
, optional, returned when output_hidden_states=True
is passed or when config.output_hidden_states=True
) — Tuple of torch.FloatTensor
(one for the output of the embeddings, if the model has an embedding layer, +
one for the output of each layer) of shape (batch_size, sequence_length, hidden_size)
.
Hidden-states of the decoder at the output of each layer plus the initial embedding outputs.
decoder_attentions (tuple(torch.FloatTensor)
, optional, returned when output_attentions=True
is passed or when config.output_attentions=True
) — Tuple of torch.FloatTensor
(one for each layer) of shape (batch_size, num_heads, sequence_length, sequence_length)
.
Attentions weights of the decoder, after the attention softmax, used to compute the weighted average in the self-attention heads.
cross_attentions (tuple(torch.FloatTensor)
, optional, returned when output_attentions=True
is passed or when config.output_attentions=True
) — Tuple of torch.FloatTensor
(one for each layer) of shape (batch_size, num_heads, sequence_length, sequence_length)
.
Attentions weights of the decoder’s cross-attention layer, after the attention softmax, used to compute the weighted average in the cross-attention heads.
encoder_last_hidden_state (torch.FloatTensor
of shape (batch_size, sequence_length, hidden_size)
, optional) — Sequence of hidden-states at the output of the last layer of the encoder of the model.
encoder_hidden_states (tuple(torch.FloatTensor)
, optional, returned when output_hidden_states=True
is passed or when config.output_hidden_states=True
) — Tuple of torch.FloatTensor
(one for the output of the embeddings, if the model has an embedding layer, +
one for the output of each layer) of shape (batch_size, sequence_length, hidden_size)
.
Hidden-states of the encoder at the output of each layer plus the initial embedding outputs.
encoder_attentions (tuple(torch.FloatTensor)
, optional, returned when output_attentions=True
is passed or when config.output_attentions=True
) — Tuple of torch.FloatTensor
(one for each layer) of shape (batch_size, num_heads, sequence_length, sequence_length)
.
Attentions weights of the encoder, after the attention softmax, used to compute the weighted average in the self-attention heads.
The Pop2PianoForConditionalGeneration forward method, overrides the __call__
special method.
Although the recipe for forward pass needs to be defined within this function, one should call the Module
instance afterwards instead of this since the former takes care of running the pre and post processing steps while
the latter silently ignores them.
( input_features attention_mask = None composer = 'composer1' generation_config = None **kwargs ) → ModelOutput or torch.LongTensor
Parameters
torch.FloatTensor
of shape (batch_size, sequence_length, hidden_size)
, optional) —
This is the featurized version of audio generated by Pop2PianoFeatureExtractor
.
attention_mask —
For batched generation input_features
are padded to have the same shape across all examples.
attention_mask
helps to determine which areas were padded and which were not.str
, optional, defaults to "composer1"
) —
This value is passed to Pop2PianoConcatEmbeddingToMel
to generate different embeddings for each
"composer"
. Please make sure that the composet value is present in composer_to_feature_token
in
generation_config
. For an example please see
https://huggingface.co/sweetcocoa/pop2piano/blob/main/generation_config.json . ~generation.GenerationConfig
, optional) —
The generation configuration to be used as base parametrization for the generation call. **kwargs
passed to generate matching the attributes of generation_config
will override them. If
generation_config
is not provided, the default will be used, which had the following loading
priority: 1) from the generation_config.json
model file, if it exists; 2) from the model
configuration. Please note that unspecified parameters will inherit GenerationConfig’s
default values, whose documentation should be checked to parameterize generation.
kwargs —
Ad hoc parametrization of generate_config
and/or additional model-specific kwargs that will be
forwarded to the forward
function of the model. If the model is an encoder-decoder model, encoder
specific kwargs should not be prefixed and decoder specific kwargs should be prefixed with decoder_. Returns
ModelOutput or torch.LongTensor
A ModelOutput (if return_dict_in_generate=True
or when config.return_dict_in_generate=True
) or a torch.FloatTensor
.
Since Pop2Piano is an encoder-decoder model (model.config.is_encoder_decoder=True
), the possible
ModelOutput types are:
Generates token ids for midi outputs.
Most generation-controlling parameters are set in generation_config
which, if not passed, will be set to the
model’s default generation configuration. You can override any generation_config
by passing the corresponding
parameters to generate(), e.g. .generate(inputs, num_beams=4, do_sample=True)
. For an overview of generation
strategies and code examples, check out the following guide.