Audio & Voice
Everything for audio and voice, from transcription to editing. Turn speech into text in 90+ languages, generate subtitles, trim, merge, normalise and clean recordings, or read and write metadata. Each capability runs by API with the price published up front.
Audio & Voice
Transcribe audio
90+ languages, published price
POST /audio/transcribe$0.004Audio & Voice
Transcript with timestamps
word-level timings
POST /audio/transcribe-timestamps$0.002Audio & Voice
Subtitles as .srt
ready-to-ship captions from any audio
POST /audio/subtitles-srt$0.002Audio & Voice
WebVTT captions
subtitles for HTML5 video
POST /audio/subtitles-vtt$0.002Audio & Voice
Identify speakers
who said what, and when
POST /audio/diarize$0.002Audio & Voice
Detect the spoken language
from any recording
POST /audio/detect-language$0.002Audio & Voice
Translate audio
hear one language, get another, published price
POST /audio/translate$0.004Audio & Voice
Summarize audio
an hour of talk, one page that matters
POST /audio/summarize$0.004Audio & Voice
Meeting minutes
decisions, owners and next steps, from audio
POST /audio/meeting-notes$0.004Audio & Voice
Action items
pull the to-dos out of any conversation
POST /audio/action-items$0.004Audio & Voice
Podcast chapters
timestamped chapters, generated for you
POST /audio/chapters$0.004Audio & Voice
Show notes
publish-ready notes from the episode audio
POST /audio/show-notes$0.004Audio & Voice
Keywords from audio
the topics inside any recording
POST /audio/keywords$0.004Audio & Voice
Audio to a blog post
turn a recording into an article
POST /audio/to-blog$0.004Audio & Voice
Moderate spoken audio
flag toxic or unsafe content
POST /audio/moderate$0.004Audio & Voice
Clean up a transcript
remove filler, fix punctuation
POST /audio/clean-transcript$0.003Audio & Voice
Search words in audio
find every mention, with timestamps
POST /audio/search$0.002Audio & Voice
Text to speech
natural voice audio from any text
POST /voice/tts$0.005Audio & Voice
SSML text to speech
control pauses, emphasis, pronunciation
POST /voice/tts-ssml$0.002Audio & Voice
Spanish text to speech
native Spanish voices from any text
POST /voice/tts-es$0.002Audio & Voice
Convert audio
MP3, WAV, OGG, M4A, FLAC
POST /audio/convert$0.077Audio & Voice
Trim audio
cut a clip out of a longer file
POST /audio/trim$0.077Audio & Voice
Normalize loudness
even volume across files
POST /audio/normalize$0.077Audio & Voice
Remove silence
strip dead air from a recording
POST /audio/remove-silence$0.077Audio & Voice
Reduce audio noise
clean up hiss and hum
POST /audio/denoise$0.077Audio & Voice
Merge audio
join several clips into one track
POST /audio/merge$0.077Audio & Voice
Split audio
cut a file into segments
POST /audio/split$0.077Audio & Voice
Audio metadata
read and write ID3 tags
POST /audio/metadata$0.077Audio & Voice
Waveform image
render a waveform or peaks JSON
POST /audio/waveform$0.077Audio & Voice
Align transcript to SRT timestamps
create timed subtitles
POST /audio/audio-to-text-srt-align$0.002Audio & Voice
Audiobook playback duration calculator
listening time by speed
POST /audio/audiobook-speed-duration$0.002Audio & Voice
Audio file size calculator
estimate MB from duration and bitrate
POST /audio/bitrate-estimate$0.002Audio & Voice
Convert audio channel layout
mono, stereo and 5.1 mapping rules
POST /audio/channel-layout-convert$0.002Audio & Voice
Crossfade duration calculator
combined length and overlap window
POST /audio/crossfade-duration$0.002Audio & Voice
Convert decibels to linear amplitude
dB amplitude calculator
POST /audio/decibel-to-linear$0.002Audio & Voice
DTMF Tone Frequency Lookup for Telephone Keypad Keys
POST /audio/dtmf-tone-lookup$0.002Audio & Voice
Audio fade envelope calculator
compute gain breakpoints
POST /audio/fade-in-out$0.002Audio & Voice
Generate a metronome click track specification from BPM and bars
POST /audio/metronome-click-track$0.002Audio & Voice
Loudness normalization gain calculator
LUFS target adjustment
POST /audio/normalize-loudness$0.002Audio & Voice
Pitch shift frequency ratio calculator
semitones to Hz
POST /audio/pitch-shift-semitones$0.002Audio & Voice
Podcast chapter timestamp formatter
create HH:MM:SS markers
POST /audio/podcast-chapter-timestamps$0.002Audio & Voice
Sample rate conversion ratio calculator
upsample or downsample
POST /audio/sample-rate-convert$0.002Audio & Voice
Silence detection threshold calculator for audio
POST /audio/silence-detect-thresholds$0.002Audio & Voice
Audio tempo change calculator
BPM percentage and duration
POST /audio/tempo-change-percent$0.002Audio & Voice
Trim audio by timestamp
validate start and end times
POST /audio/trim-by-timestamp$0.002Audio & Voice
Adjust audio volume in decibels
peak level and clipping calculator
POST /audio/volume-adjust-db$0.002Audio & Voice
Audio export preset lookup
format, bitrate, and sample rate
POST /audio/audio-export-preset-lookup$0.002Audio & Voice
Peak normalization gain calculator
target dBFS adjustment
POST /audio/audio-normalize-peak-target$0.002Audio & Voice
Seamless loop crossfade calculator
find the overlap window
POST /audio/loop-point-crossfade-calc$0.002Audio & Voice
Calculate speaking rate in words per minute
POST /audio/speech-rate-wpm-calculate$0.002Audio & Voice
Concatenate audio clips
calculate duration and start offsets
POST /audio/merge-clips$0.002Audio & Voice
Format audio chapters for podcast apps
Podcasting 2.0 JSON
POST /audio/audio-chapter-export-format$0.002Audio & Voice
Estimate audio duration after trimming silence
POST /audio/audio-silence-trim-estimate$0.002Audio & Voice
Podcast ad slot timestamp calculator
pre-roll, mid-roll and post-roll
POST /audio/podcast-ad-slot-timing$0.002Audio & Voice
Ringtone clip window suggester
find a 20–30 second hook
POST /audio/ringtone-clip-suggest$0.002Audio & Voice
Compute multitrack mixdown gain from peaks and relative levels
POST /audio/multi-track-mixdown-levels$0.002Audio & Voice
Shift karaoke lyrics timing by a global millisecond offset
POST /audio/karaoke-lyrics-sync-shift$0.002Audio & Voice
Audio file size calculator
MB from duration and PCM specs
POST /audio/audio-file-size$0.002Audio & Voice
Playback speed calculator
adjusted media duration at any rate
POST /audio/playback-speed$0.002Audio & Voice
Port length calculator
speaker enclosure vent length in inches
POST /audio/port-length$0.002