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Module options

This is pulled directly from the Alsa-HOWTO, then reformatted.

ESS Maestro-1/2/2E -ES1968/ES1978 series Module snd-card-es1968.o for soundcards based on ESS Maestro-1/2/2E -ES1968/ES1978 series chips. This Module supports up to 8 cards and autoprobe.

snd_dac_frame_size  - max dac playback frame size in kB, 4-64kB
snd_adc_frame_size  - max adc record frame size in kB, 4-64kB
snd_gesbuf          - total buffer size in kB, 1-4096kB
snd_midi_enable     - enable MIDI support 0 = off, 1 = on
snd_pcm_channels_p  - playback channels 1-8, default=2
snd_pcm_channels_c  - capture channels, 1-8, default=0

Since (at least) ALSA 1.0 this has changed. The options are now:

index          - Index
id          - ID for ALSA to use
enable          - whether to enable the card
total_bufsize       - total buffer size in kB, 1-4096kB
pcm_substreams_p    - number of PCM playback channels
pcm_substreams_c    - same for capturing (recording)
clock           - ? (use 0 for autodetect)
use_pm          - Attemp power managment (0 = off, 1 = on, 2 = auto)
enable_mpu      - Enable MPU401 (0 = off, 1 = on, 2= auto)

All options are arrays, with array position corresponding to card number. I.e. id=card0,,foo would call the first card 'card0' (the default), let the driver choose the default for the second card and call the third card 'foo'.

Extra notes

  1. This card is one of the few that supports hardware mixing in ALSA. You can have upto four applications playing at the same time through the stereo output. - Patrick Shirkey
  2. This is not the same card as the ES1969. - A.M.

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Category: ALSA modules