[Bug] Truncated audio when generating speech

[koutheir]

Describe the bug

When generating speech audio from the following text, the generated file contains only a truncated speech audio, that is, the speech audio is interrupted before the sentences are pronounced.

Text:

Multiple debugging information entries may share the same abbreviation table entry. Each compilation unit is associated with a particular abbreviation table, but multiple compilation units may share the same table.

Generated speech audio: tts_output.zip

To Reproduce

$ tts --text 'Multiple debugging information entries may share the same abbreviation table entry. Each compilation unit is associated with a particular abbreviation table, but multiple compilation units may share the same table.'

Expected behavior

Generation of speech audio for the full input text.

Logs

$ tts --text 'Multiple debugging information entries may share the same abbreviation table entry. Each compilation unit is associated with a particular abbreviation table, but multiple compilation units may share the same table.'
 > tts_models/en/ljspeech/tacotron2-DDC is already downloaded.
 > vocoder_models/en/ljspeech/hifigan_v2 is already downloaded.
 > Using model: Tacotron2
 > Setting up Audio Processor...
 | > sample_rate:22050
 | > resample:False
 | > num_mels:80
 | > log_func:np.log
 | > min_level_db:-100
 | > frame_shift_ms:None
 | > frame_length_ms:None
 | > ref_level_db:20
 | > fft_size:1024
 | > power:1.5
 | > preemphasis:0.0
 | > griffin_lim_iters:60
 | > signal_norm:False
 | > symmetric_norm:True
 | > mel_fmin:0
 | > mel_fmax:8000.0
 | > pitch_fmin:0.0
 | > pitch_fmax:640.0
 | > spec_gain:1.0
 | > stft_pad_mode:reflect
 | > max_norm:4.0
 | > clip_norm:True
 | > do_trim_silence:True
 | > trim_db:60
 | > do_sound_norm:False
 | > do_amp_to_db_linear:True
 | > do_amp_to_db_mel:True
 | > do_rms_norm:False
 | > db_level:None
 | > stats_path:None
 | > base:2.718281828459045
 | > hop_length:256
 | > win_length:1024
 > Model's reduction rate `r` is set to: 1
 > Vocoder Model: hifigan
 > Setting up Audio Processor...
 | > sample_rate:22050
 | > resample:False
 | > num_mels:80
 | > log_func:np.log
 | > min_level_db:-100
 | > frame_shift_ms:None
 | > frame_length_ms:None
 | > ref_level_db:20
 | > fft_size:1024
 | > power:1.5
 | > preemphasis:0.0
 | > griffin_lim_iters:60
 | > signal_norm:False
 | > symmetric_norm:True
 | > mel_fmin:0
 | > mel_fmax:8000.0
 | > pitch_fmin:0.0
 | > pitch_fmax:640.0
 | > spec_gain:1.0
 | > stft_pad_mode:reflect
 | > max_norm:4.0
 | > clip_norm:True
 | > do_trim_silence:False
 | > trim_db:60
 | > do_sound_norm:False
 | > do_amp_to_db_linear:True
 | > do_amp_to_db_mel:True
 | > do_rms_norm:False
 | > db_level:None
 | > stats_path:None
 | > base:2.718281828459045
 | > hop_length:256
 | > win_length:1024
 > Generator Model: hifigan_generator
 > Discriminator Model: hifigan_discriminator
Removing weight norm...
 > Text: Multiple debugging information entries may share the same abbreviation table entry. Each compilation unit is associated with a particular abbreviation table, but multiple compilation units may share the same table.
 > Text splitted to sentences.
['Multiple debugging information entries may share the same abbreviation table entry.', 'Each compilation unit is associated with a particular abbreviation table, but multiple compilation units may share the same table.']
   > Decoder stopped with `max_decoder_steps` 500
 > Processing time: 5.151856899261475
 > Real-time factor: 0.4295162001993176
 > Saving output to tts_output.wav

Environment

{
    "CUDA": {
        "GPU": [
            "Quadro RTX 5000 with Max-Q Design"
        ],
        "available": true,
        "version": "10.2"
    },
    "Packages": {
        "PyTorch_debug": false,
        "PyTorch_version": "1.11.0+cu102",
        "TTS": "0.6.2",
        "numpy": "1.19.5"
    },
    "System": {
        "OS": "Linux",
        "architecture": [
            "64bit",
            "ELF"
        ],
        "processor": "",
        "python": "3.9.12",
        "version": "#1 SMP PREEMPT Debian 5.16.18-1 (2022-03-29)"
    }
}

Additional context

No response

[erogol]

There is a limit on the sentence length for the default model. Either split the longest sentence into two or use a different model.

[koutheir]

There is a limit on the sentence length for the default model.

• What is that exact limit?
• How can one find this information for a particular model?
• How is the length calculated (character count, word count, etc.)?

[koutheir]

@erogol, please reopen this issue as there are still pending questions about it, and I don't think I'm the only person asking them.

[koutheir]

@JRMeyer, can you please reopen this issue, or at least answer the questions above? @erogol doesn't seem to be responsive.

[a-t-0]

I would also like to know how to know the information @koutheir asked for :) :

* What is that exact limit?

* How can one find this information for a particular model?

* How is the length calculated (character count, word count, etc.)?

So it would be nice if the question could be re-opened.

FYI, here is a work-around given in this issue:
Add:

"max_decoder_steps": 5000

at the end of the config file of the (default) model, in:

~/.local/share/tts/vocoder_models--en--ljspeech--hifigan_v2/config.json

Note, json expects a comma at the end of a line if the line is followed by another property/line. So you have to add a comma to the previous last line, and ensure you don't add a comma to your own "max_decoder_steps": 5000 command. TL;DR: make the last lines look like:

    // PATHS
    "output_path": "/home/erogol/gdrive/Trainings/sam/",
    // Custom limit made larger
    "max_decoder_steps": 5000
}

[a-t-0]

Here is a small script that splits up a text into separate sentences, then converts those sentences into a single .mp3 file:
First install it with this installer.sh:

pip install TTS
#git clone git@github.com:coqui-ai/TTS.git
#cd TTS
#pip install -e .[all,dev,notebooks]  # Select the relevant extras
mkdir -p "output/path/"
tts --text "Text for TTS" --out_path output/path/speech.wav

# The TTS does not allow for long sentences, so to work around this, 
# you could increase the permitted max_decoder_steps.
# Source: https://github.com/coqui-ai/TTS/issues/1333

# Open the configuration of the default model, 
# (which is en--ljspeech--hifigan_v2), located at:
# ~/.local/share/tts/vocoder_models--en--ljspeech--hifigan_v2/config.json

# Then add/ensure it contains:
# "max_decoder_steps": 5000

# In short, make the last lines of the config.json look like:
#    // PATHS
#    "output_path": "/home/erogol/gdrive/Trainings/sam/",
#    // Custom limit made larger
#    "max_decoder_steps": 5000
#}

# Install text parsing packages:
pip install nltk
pip install pydub

# Do a test run.
the_text='"'$(cat text.txt)'"'
tts --text "$the_text" --out_path output/path/text.wav

Run it with:

chmod +x installer.sh
./installer.sh

Then add that max_decoder_steps manually, like described above.
Then you can create a text.txt with your complete text, and run:

python text2speech.py

Below is the text2speech.py content:

""" Browse into audio/ dir and run:
python text2speech.py
to convert the audio files into a .wav file"""



import os
import re
import subprocess
from pydub import AudioSegment


def split_into_sentences_using_nlp():
    import nltk.data
    nltk.download()

    tokenizer = nltk.data.load('tokenizers/punkt/english.pickle')
    fp = open("text.txt")
    data = fp.read()
    sentences='\n-----\n'.join(tokenizer.tokenize(data))
    return sentences


def load_txt_from_file(filename):
    fp = open(filename)
    text = fp.read()
    return text


def split_into_sentences(text):
    # Specify regex values.
    alphabets= "([A-Za-z])"
    prefixes = "(Mr|St|Mrs|Ms|Dr)[.]"
    suffixes = "(Inc|Ltd|Jr|Sr|Co)"
    starters = "(Mr|Mrs|Ms|Dr|He\s|She\s|It\s|They\s|Their\s|Our\s|We\s|But\s|However\s|That\s|This\s|Wherever)"
    acronyms = "([A-Z][.][A-Z][.](?:[A-Z][.])?)"
    websites = "[.](com|net|org|io|gov)"

    # Perform conversion.
    text = " " + text + "  "
    text = text.replace("\n"," ")
    text = re.sub(prefixes,"\\1<prd>",text)
    text = re.sub(websites,"<prd>\\1",text)
    if "Ph.D" in text: text = text.replace("Ph.D.","Ph<prd>D<prd>")
    text = re.sub("\s" + alphabets + "[.] "," \\1<prd> ",text)
    text = re.sub(acronyms+" "+starters,"\\1<stop> \\2",text)
    text = re.sub(alphabets + "[.]" + alphabets + "[.]" + alphabets + "[.]","\\1<prd>\\2<prd>\\3<prd>",text)
    text = re.sub(alphabets + "[.]" + alphabets + "[.]","\\1<prd>\\2<prd>",text)
    text = re.sub(" "+suffixes+"[.] "+starters," \\1<stop> \\2",text)
    text = re.sub(" "+suffixes+"[.]"," \\1<prd>",text)
    text = re.sub(" " + alphabets + "[.]"," \\1<prd>",text)
    if "”" in text: text = text.replace(".”","”.")
    if "\"" in text: text = text.replace(".\"","\".")
    if "!" in text: text = text.replace("!\"","\"!")
    if "?" in text: text = text.replace("?\"","\"?")
    text = text.replace(".",".<stop>")
    text = text.replace("?","?<stop>")
    text = text.replace("!","!<stop>")
    text = text.replace("<prd>",".")
    sentences = text.split("<stop>")
    sentences = sentences[:-1]
    sentences = [s.strip() for s in sentences]
    return sentences

def convert_sentences_to_wav_files(filename: str,output_dir:str ,sentences: list):
    soundbite_filepaths=[]
    for i,sentence in enumerate(sentences):
        soundbite_filepath=f"{output_dir}/{filename}_{i}.wav"
        command=f'tts --text "{sentence}" --out_path {soundbite_filepath}'
        print(f'command={command}')
        subprocess.Popen(command, shell=True, stdout=subprocess.PIPE).stdout.read()
        soundbite_filepaths.append(soundbite_filepath)
    return soundbite_filepaths
    
def install_ffmpeg_if_needed(format):
    if format =="mp3":
        subprocess.Popen("yes | sudo apt install ffmpeg", shell=True, stdout=subprocess.PIPE).stdout.read()

def merge_wav_files_into_single_mp3(format: str,output_dir:str,output_filename:str,soundbite_filepaths:list):
    if format not in ["mp3","wav"]:
        raise Exception(f"Format:{format} not supported.")
    install_ffmpeg_if_needed(format)

    output_filepath=f"{output_dir}/{output_filename}.{format}"
    print(f'output_filepath={output_filepath}')

    
    combined_sounds=None
    for soundbite_filepath in soundbite_filepaths:
        print(f'soundbite_filepath={soundbite_filepath}')
        some_sound=AudioSegment.from_wav(soundbite_filepath)
        if combined_sounds is None:
            combined_sounds=some_sound    
        else:
            combined_sounds=combined_sounds+some_sound

    #combined_sounds = sound1 + sound2
    #combined_sounds.export("/output/path.wav", format="wav")
    #combined_sounds.export("/output/path.mp3", format="mp3")
    combined_sounds.export(output_filepath, format=format)

def get_output_files(output_dir,soundbite_filename):
    soundbite_filepaths=[]
    for i in range(0,10000):
        soundbite_filepath=f"{output_dir}/{soundbite_filename}_{i}.wav"
        if os.path.isfile(soundbite_filepath):
            soundbite_filepaths.append(soundbite_filepath)
    return soundbite_filepaths

def merge_without_converting(extension, output_dir,output_filename,soundbite_filename):
    soundbite_filepaths=get_output_files(output_dir,soundbite_filename)
    print(f'soundbite_filepaths={soundbite_filepaths}')
    merge_wav_files_into_single_mp3(extension,output_dir,output_filename,soundbite_filepaths)
    exit()


# Specify the audio output dir.
output_dir="output"
soundbite_filename="soundbite"
output_filename="Spoken_text"
extension="mp3"
# TODO: ensure and verify output dir exists.

# TODO: Clear out output directory before starting.

# TODO: allow manually overwriting a single soundbite without converting the entire text.

# Optional: If you already generated the separate .wav soundbites and would like to merge.
# merge_without_converting(extension, output_dir,output_filename,soundbite_filename)

# Load the presentation text from file.
text=load_txt_from_file("text.txt")
# Separate the text into smaller sentences.
sentences=split_into_sentences(text)
print(f'sentences={sentences}')

# TODO: Verify the sentences are short enough.

# Convert the sentences into .wav files
soundbite_filepaths= convert_sentences_to_wav_files(soundbite_filename,output_dir,sentences)

# Merge the .wav files into a single .wav file
merge_wav_files_into_single_mp3(extension,output_dir,output_filename,soundbite_filepaths)

Here is the related repo: https://github.com/a-t-0/icons_poster