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Speex to ADPCM - Online Audio Converter
Convert Speex to ADPCM online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert Speex to ADPCM
Drop Speex audio here or click to select
Speex, OGG
ADPCM (ADPCM)
About Speex to ADPCM
Convert Speex to ADPCM. Speex compresses speech at telecom bitrates for voice apps. ADPCM predicts samples to quarter voice-band bitrates. Variants differ by vendor, so confirm the flavor before converting..
Why convert Speex to ADPCM?
- Smaller files with ADPCM lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
Speex vs ADPCM
| Codec | Speex | ADPCM |
|---|---|---|
| Compression | lossy | lossy |
| Sample behavior | Quality set by bitrate | Quality set by bitrate |
| Typical use | Speex compresses speech at telecom bitrates for voice apps. | ADPCM predicts samples to quarter voice-band bitrates. |
When not to convert Speex to ADPCM
- Skip ADPCM for archival masters: lossy compression discards detail, so keep the Speex original.
- Keep a master copy: repeated exports stack small losses, so archive Speex before batch ADPCM shares.
Limits
Starting point: Speex - Speex compresses speech at telecom bitrates for voice apps. Wideband modes confuse old tools; verify rate after conversion. Variants differ by vendor, so confirm the flavor before converting. Encode ADPCM (ADPCM) from Speex at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
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FAQ
How do I convert Speex to ADPCM?
Drop your Speex file onto this page, choose quality and codec settings, then click Convert. The result downloads as ADPCM instantly. All processing runs in your browser.
What codec is used for ADPCM?
The default codec for ADPCM is ADPCM. You can change audio parameters in Advanced mode.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.