https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/rme9652/hdsp.c
static struct snd_pcm_hardware snd_hdsp_capture_subinfo = { .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_NONINTERLEAVED | SNDRV_PCM_INFO_SYNC_START), #ifdef SNDRV_BIG_ENDIAN .formats = SNDRV_PCM_FMTBIT_S32_BE, #else .formats = SNDRV_PCM_FMTBIT_S32_LE, #endif .rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000), .rate_min = 32000, .rate_max = 96000, .channels_min = 5, .channels_max = HDSP_MAX_CHANNELS, .buffer_bytes_max = HDSP_CHANNEL_BUFFER_BYTES * HDSP_MAX_CHANNELS, .period_bytes_min = (64 * 4) * 10, .period_bytes_max = (8192 * 4) * HDSP_MAX_CHANNELS, .periods_min = 2, .periods_max = 2, .fifo_size = 0 }; only support 2 periods and non-interleaved access mode pulseaudio cannot use 4 fragments this mean one period of channel 1 , follow by one period of channel 2 ,..., one period of channel n seem has flag to control the precision of hw pointer static snd_pcm_uframes_t hdsp_hw_pointer(struct hdsp *hdsp) { int position; position = hdsp_read(hdsp, HDSP_statusRegister); if (!hdsp->precise_ptr) return (position & HDSP_BufferID) ? (hdsp->period_bytes / 4) : 0; position &= HDSP_BufferPositionMask; position /= 4; position &= (hdsp->period_bytes/2) - 1; return position; } -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1390474 Title: "Volume element PCM has 6 channels. That's too much!" - PA doesn't support elements with more than two channels Status in PulseAudio: Unknown Status in pulseaudio package in Ubuntu: Fix Released Bug description: When connecting the Terratec PHASE26 in 16/48 mode (6 channels) I get the error "Volume element PCM has 6 channels. That's too much! I can't handle that!" and the card fails to show up in Sound Settings. Everything is fine with 24/48 mode (2 channels). To manage notifications about this bug go to: https://bugs.launchpad.net/pulseaudio/+bug/1390474/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp