SPX (audio/speex) uses lossy compression optimized for voip telephony, voice chat, speech compression. Speex, open-source speech codec for VoIP and voice
Sun Sound (SND) is a basic Unix audio format for simple sound effects and system sounds on Sun workstations.
Reach for SPX when your priority is voip telephony, voice chat, speech compression — its efficient compression makes sharing fast and storage minimal.
Reach for SND when your priority is unix sound effects, legacy sun audio files — its uncompromising quality ensures every detail is preserved.
Learn more about SPX and SND formats in our detailed guide.
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SPX (SPX) - Speex, open-source speech codec for VoIP and voice. Best for voip telephony, voice chat, speech compression.
SND (SND audio) - Sun Sound, basic Unix audio format for workstation sounds. Ideal for unix sound effects, legacy sun audio files.
Yes, GoConvertFile offers free conversion of SPX to SND for files up to 100MB. No registration required.
Most SPX to SND conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
SND is ideal for unix sound effects, legacy sun audio files. Sun Sound, basic Unix audio format for workstation sounds
No, converting SPX to SND does not cause additional quality loss — SND uses lossless compression. However, any artifacts already present in the original SPX file will persist in the SND output.
SND files are typically 2-5x larger than equivalent SPX files because SND preserves all pixel data. This is expected and necessary for lossless quality.