SPX (audio/speex) uses lossy compression optimized for voip telephony, voice chat, speech compression. Speex, open-source speech codec for VoIP and voice
CDDA (audio/x-cda) uses lossless compression optimized for cd ripping, audio archiving, high-fidelity audio. CD Digital Audio, raw audio track from compact discs
Reach for SPX when your priority is voip telephony, voice chat, speech compression — its efficient compression makes sharing fast and storage minimal.
Reach for CDDA when your priority is cd ripping, audio archiving, high-fidelity audio — its uncompromising quality ensures every detail is preserved.
Learn more about SPX and CDDA 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.
CDDA (CDDA) - CD Digital Audio, raw audio track from compact discs. Ideal for cd ripping, audio archiving, high-fidelity audio.
Yes, GoConvertFile offers free conversion of SPX to CDDA for files up to 100MB. No registration required.
Most SPX to CDDA conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
CDDA is ideal for cd ripping, audio archiving, high-fidelity audio. CD Digital Audio, raw audio track from compact discs
No, converting SPX to CDDA does not cause additional quality loss — CDDA uses lossless compression. However, any artifacts already present in the original SPX file will persist in the CDDA output.
CDDA files are typically 2-5x larger than equivalent SPX files because CDDA preserves all pixel data. This is expected and necessary for lossless quality.