[問題] FreeBSD 音效如何使用5.1聲道

看板FreeBSD作者CrashCat.時間20年前 (2005/03/30 20:01)推噓0(0推 0噓 0→)

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有沒有人有在FreeBSD下播放5.1聲道音效的經驗? 在網路上找了不少資料, 似乎都不大work.. 以下是我的測試: OS: FreeBSD 4.11 音效卡: SoundBlaster Live! (model:4830) 用snd_emu10k1驅動 # kldstat Id Refs Address Size Name 1 3 0xc0100000 2b2dc4 kernel 2 1 0xc1fdd000 5000 snd_emu10k1.ko 3 1 0xc1fe3000 15000 snd_pcm.ko 有設了vchans = 6 (不過後來發現這是多弄幾個dev把聲音混音,用途不同) # sysctl -a |grep snd hw.snd.targetirqrate: 32 hw.snd.report_soft_formats: 1 hw.snd.verbose: 1 hw.snd.maxautovchans: 6 hw.snd.pcm0.buffersize: 4096 hw.snd.pcm0.vchans: 6 # cat /dev/sndstat FreeBSD Audio Driver (newpcm) Installed devices: pcm0: <Creative EMU10K1> at io 0xe000 irq 10 (4p/2r/6v channels duplex) 用mplayer測試, 雙聲道測試OK # mplayer -ao oss -channels 2 xxx.wav ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 44100 Hz, 6 ch, 16 bit (0x10), ratio: 529200->529200 (4233.6 kbit) Selected audio codec: [pcm] afm:pcm (Uncompressed PCM) ========================================================================== Checking audio filter chain for 44100Hz/6ch/16bit -> 44100Hz/2ch/16bit... AF_pre: af format: 2 bps, 6 ch, 44100 hz, little endian signed int AF_pre: 44100Hz 6ch Signed 16-bit (Little-Endian) AO: [oss] 44100Hz 2ch Signed 16-bit (Little-Endian) (2 bps) Building audio filter chain for 44100Hz/6ch/16bit -> 44100Hz/2ch/16bit... Video: no video Starting playback... A: 2.7 1.3% 0% .... 用mplayer測試, 4聲道測試失敗(6聲道也失敗) # mplayer -ao oss -channels 4 xxxx.wav ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 44100 Hz, 6 ch, 16 bit (0x10), ratio: 529200->529200 (4233.6 kbit) Selected audio codec: [pcm] afm:pcm (Uncompressed PCM) ========================================================================== Checking audio filter chain for 44100Hz/6ch/16bit -> 44100Hz/4ch/16bit... AF_pre: af format: 2 bps, 6 ch, 44100 hz, little endian signed int AF_pre: 44100Hz 6ch Signed 16-bit (Little-Endian) audio_setup: Failed to set audio device to 4 channels Could not open/initialize audio device -> no sound. Audio: no sound Video: no video 有沒有人在這方面有經驗願意分享一下? Thanks..^^ -- ※ Origin: 臺大電機 Maxwell 站 ◆ From: adsl-220-229-54-51.KH.sparqnet.net