tts: Text-to-Speech (Speech Synthesis)

In text2speech: Text to Speech Conversion

Text-to-Speech (Speech Synthesis)

Description

Convert text-to-speech using various engines, including Amazon Polly, Coqui TTS, Google Cloud Text-to-Speech API, Microsoft Cognitive Services Text to Speech REST API, and Speechify Text-to-Speech API.

With the exception of Coqui TTS and Speechify, all these engines are accessible as R packages:

• aws.polly is a client for Amazon Polly.

• googleLanguageR is a client to the Google Cloud Text-to-Speech API.

• conrad is a client to the Microsoft Cognitive Services Text to Speech REST API

Speechify is called directly through its REST API (https://docs.speechify.ai) using the key in the SPEECHIFY_API_KEY environment variable.

Usage

tts(
  text,
  output_format = c("mp3", "wav"),
  service = c("amazon", "google", "microsoft", "coqui", "speechify"),
  bind_audio = TRUE,
  ...
)

tts_amazon(
  text,
  output_format = c("mp3", "wav"),
  voice = "Joanna",
  bind_audio = TRUE,
  save_local = FALSE,
  save_local_dest = NULL,
  ...
)

tts_google(
  text,
  output_format = c("mp3", "wav"),
  voice = "en-US-Standard-C",
  bind_audio = TRUE,
  save_local = FALSE,
  save_local_dest = NULL,
  ...
)

tts_microsoft(
  text,
  output_format = c("mp3", "wav"),
  voice = NULL,
  bind_audio = TRUE,
  save_local = FALSE,
  save_local_dest = NULL,
  ...
)

tts_coqui(
  text,
  exec_path,
  output_format = c("wav", "mp3"),
  model_name = "tacotron2-DDC_ph",
  vocoder_name = "ljspeech/univnet",
  bind_audio = TRUE,
  save_local = FALSE,
  save_local_dest = NULL,
  ...
)

tts_speechify(
  text,
  output_format = c("mp3", "wav"),
  voice = "geffen_32",
  model = "simba-3.2",
  bind_audio = TRUE,
  save_local = FALSE,
  save_local_dest = NULL,
  ...
)

Arguments

text	A character vector of text to be spoken
output_format	Format of output files: "mp3" or "wav"
service	Service to use (Amazon, Google, Microsoft, Coqui, or Speechify)
bind_audio	Should the tts_bind_wav() be run on after the audio has been created, to ensure that the length of text and the number of rows is consistent?
...	Additional arguments
voice	Full voice name
save_local	Should the audio file be saved locally?
save_local_dest	If to be saved locally, destination where output file will be saved
exec_path	System path to Coqui TTS executable
model_name	(Coqui TTS only) Deep Learning model for Text-to-Speech Conversion
vocoder_name	(Coqui TTS only) Voice coder used for speech coding and transmission
model	(Speechify only) Model used for synthesis. The default, "simba-3.2", is English only; use "simba-3.0" for voices in other languages

Value

A standardized tibble featuring the following columns:

• index : Sequential identifier number

• original_text : The text input provided by the user

• text : In case original_text exceeds the character limit, text represents the outcome of splitting original_text. Otherwise, text remains the same as original_text.

• wav : Wave object (S4 class)

• file : File path to the audio file

• audio_type : The audio format, either mp3 or wav

• duration : The duration of the audio file

• service : The text-to-speech engine used

Examples

## Not run: 
# Amazon Polly
tts("Hello world! This is Amazon Polly", service = "amazon")

tts("Hello world! This is Coqui TTS", service = "coqui")

tts("Hello world! This is Google Cloud", service = "google")

tts("Hello world! This is Microsoft", service = "microsoft")

tts("Hello world! This is Speechify", service = "speechify")

## End(Not run)

text2speech documentation built on Sept. 30, 2026, 5:11 p.m.