SPX vs VOC
Um comparativo detalhado de Speex Audio e Creative Voice — tamanho de arquivo, qualidade, compatibilidade e qual escolher de acordo com seu fluxo de trabalho.
Speex Audio
Audio FilesSpeex is an open-source audio compression format specifically designed for speech encoding. It uses Code-Excited Linear Prediction (CELP) and supports narrowband, wideband, and ultra-wideband modes for different speech quality requirements.
Sobre os arquivos SPXCreative Voice
Audio FilesVOC (Creative Voice) is an audio file format created by Creative Labs for Sound Blaster sound cards. It was a dominant PC audio format in the DOS gaming era, supporting multiple data blocks with different sample rates within a single file.
Sobre os arquivos VOCComparativo de vantagens
SPX Vantagens
- Patent-free voice codec.
- Three sample-rate modes for voice.
- Low CPU decode.
VOC Vantagens
- Retro-gaming archive format.
- Supported by DOSBox and SoX.
- Block-based structure allows streaming.
Limitações
SPX Limitações
- Deprecated in favor of Opus.
- No music support.
- Rarely used in new projects.
VOC Limitações
- Legacy — no new content since mid-1990s.
- Limited sample rates (up to 44.1 kHz).
- No metadata.
Especificações técnicas
| Especificação | SPX | VOC |
|---|---|---|
| MIME type | audio/speex | audio/x-voc |
| Extension | .spx | .voc |
| Container | Ogg | — |
| Modes | Narrowband/Wideband/Ultra-wideband | — |
| Successor | Opus | — |
| Codecs | — | PCM 8/16-bit, ADPCM |
| Hardware origin | — | Sound Blaster Pro (1991) |
Tamanhos típicos de arquivo
SPX
- 1 min voice (wideband 24 kbps) ~180 KB
VOC
- DOS game sound effect 5-50 KB
- Short speech sample 30-300 KB
Pronto para converter?
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Perguntas frequentes
SPX (Speex Audio) is an audio formatoo de arquivo used to store sound recordings — music, voice, podcasts, sound effects. The formato defines how the audio samples are comprimido (or stored raw), what bitrates are suportado, e how metadata como title, artist, album, e cover art is embedded. It is part of the audio arquivos family.
VOC (Creative Voice) is an audio formatoo de arquivo used to store sound recordings — music, voice, podcasts, sound effects. The formato defines how the audio samples are comprimido (or stored raw), what bitrates are suportado, e how metadata como title, artist, album, e cover art is embedded. It is part of the audio arquivos family.
VLC, foobar2000, e the default media players no Windows e macOS handle SPX natively. On mobile, iOS Music e Android media apps vary in their support — popular formatoos funcionar everywhere; niche ones may need a dedicated app. If playback fails em um device, convertendo to MP3 ou AAC Geralmente solves it.
VLC, foobar2000, e the default media players no Windows e macOS handle VOC natively. On mobile, iOS Music e Android media apps vary in their support — popular formatoos funcionar everywhere; niche ones may need a dedicated app. If playback fails em um device, convertendo to MP3 ou AAC Geralmente solves it.
Upload the SPX to KaijuConverter e pick MP3, WAV, FLAC, AAC, OGG, ou any other target. Our FFmpeg pipeline decodes the audio e re-encodes para o target formato at sensible default bitrates (VBR ~190 kbps para music, 96 kbps para speech). Metadata e cover art travel com the audio where both formatoos support them.
SPX can be com perdas ou sem perdas depending no specific variant. com perdas variants (smaller files) discard some audio detail durante compressão in ways tuned to be inaudible; sem perdas variants preserve every sample exactly mas produce larger files. para distribution, com perdas at alta bitrate is padrão; para archival, sem perdas wins.