Pular para o conteúdo principal
🇬🇧 English 🇪🇸 Español 🇩🇪 Deutsch
Conversor de imagens Conversor de vídeo Conversor de áudio Conversor de documentos
Ferramentas Guias Formatos Preços API
Entrar
SPX file
spx
Formato de arquivo

Sobre os arquivos SPX

Áudio Speex

Lançado em 2003 Por Jean-Marc Valin (Xiph.Org)

Codec áudio Xiph.Org (2002) otimizado para voz. Predecessor do Opus. Substituído por Opus (mesma família, superior).

Família

Audio Files

Extensão

.spx

Tipo MIME

audio/x-speex

Pode ser usado como

Entrada Saída
A história

COMO NASCEU O
FORMATO SPX.

2003
2012

Speex was a Xiph.Org codec designed specifically for voice. Jean-Marc Valin released the first version in 2003 as an open-source, patent-free alternative to proprietary voice codecs (GSM, G.729) that dominated VoIP at the time. Speex offered three modes — narrowband, wideband, ultra-wideband — covering 8 kHz to 32 kHz sample rates, all tuned for human speech rather than music.

For a few years Speex was the default VoIP codec in open-source telephony. Asterisk, Ekiga, Linphone, Mumble, and several Nintendo DS game cartridges used it. Then Jean-Marc Valin himself designed Opus (2012) to obsolete Speex — a single codec that handles voice and music better than Speex and Vorbis combined. Xiph.Org officially deprecated Speex in 2012 in favor of Opus. .spx files still exist in legacy VoIP recordings.

CURIOSIDADES E
FATOS INTERESSANTES.

01

Speex's own creator, Jean-Marc Valin, later designed Opus specifically to replace it.

02

Xiph.Org officially deprecated Speex in 2012 — a rare case of a project retiring its own creation.

03

Nintendo DS games used Speex for voice and sound effects in titles like Brain Age and Nintendogs.

04

Mumble voice chat defaulted to Speex before switching to Opus in 2011.

05

Speex supports three sample rates: narrowband 8 kHz (telephony), wideband 16 kHz (high-quality voice), ultra-wideband 32 kHz.

VANTAGENS E
LIMITAÇÕES.

Vantagens

  • Patent-free voice codec.
  • Three sample-rate modes for voice.
  • Low CPU decode.

Limitações

  • Deprecated in favor of Opus.
  • No music support.
  • Rarely used in new projects.

Tamanhos típicos de arquivo

1 min voice (wideband 24 kbps)

~180 KB

Especificações técnicas

MIME type
audio/speex
Extension
.spx
Container
Ogg
Modes
Narrowband/Wideband/Ultra-wideband
Successor
Opus

CONVERTER A PARTIR DE
SPX

Casos de uso comuns

Voice over IP, speech encoding, podcast recording, voice chat

Formatos relacionados

Comparativos populares

Conversões populares de SPX

Os destinos mais procurados ao converter arquivos SPX.

Perguntas frequentes sobre SPX

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.

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.

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.

Usamos cookies e tecnologias similares para personalizar conteúdo e anúncios, e para analisar o tráfego. Mais informações sobre cookies.