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Speex to GSM - Online Audio Converter
Convert Speex to GSM online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert Speex to GSM
Drop Speex audio here or click to select
Speex, OGG
GSM (GSM)
About Speex to GSM
Convert Speex to GSM. Speex compresses speech at telecom bitrates for voice apps. GSM 06.10 encodes European mobile speech at 13 kbps. Carrier framing can offset timing; verify duration..
Why convert Speex to GSM?
- Smaller files with GSM lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
Speex vs GSM
| Codec | Speex | GSM |
|---|---|---|
| Compression | lossy | lossy |
| Sample behavior | Quality set by bitrate | Quality set by bitrate |
| Typical use | Speex compresses speech at telecom bitrates for voice apps. | GSM 06.10 encodes European mobile speech at 13 kbps. |
When not to convert Speex to GSM
- Skip GSM 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 GSM shares.
Limits
Starting point: Speex - Speex compresses speech at telecom bitrates for voice apps. Wideband modes confuse old tools; verify rate after conversion. Carrier framing can offset timing; verify duration. Encode GSM (GSM) 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 GSM?
Drop your Speex file onto this page, choose quality and codec settings, then click Convert. The result downloads as GSM instantly. All processing runs in your browser.
What codec is used for GSM?
The default codec for GSM is GSM. 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.