[Alsa-user] ESS 1688

[Hans E. <ha...@so...>]

Hi alsa-users!

I have an old laptop with an ESS 1688, which is working with
snd_es1688. The following setting was used to load it:

# modprobe snd_es1688 index=0 port=0x220 mpu_port=0x330 irq=5 dma8=1 mpu_irq=9

I have two problems with it:

1. The recording level is reset to 100% whenever I quit alsamixer, or
starting a new recording. The only way to control it seems to be to 
   a. start alsamixer
   b. start a new recording
   c. set the recording level appropriate

Any hints on what I can try here?

2. I cannot use the card in full duplex mode. Is this card able to do
full duplex as other SB16 cards? I understand that SB16 cards can do
full duplex under the following conditions:

* The record and playback sample rate must be equal 
* one of the two must operate in 8-bit mode and the other in 16-bit
  mode.

So, does that apply to the ESS 1688 also? When I tried to do full
duplex under this conditions I didn't succeed. Here is the output of
an ecasound-session:

(eca-chainsetup) Audio object "old-track.wav", mode "read".
(audio-io) Format: u8, channels 2, srate 44100, interleaved.
(eca-chainsetup) Audio object "alsahw", mode "read".
(audio-io) Format: s16_le, channels 2, srate 44100, interleaved.
ERROR: Connecting chainsetup failed: "Enabling chainsetup: AUDIOIO-ALSA: Unable to
... open ALSA-device for playback; error: Device or resource busy"

kind regards,

-- 
Hans Ekbrand (http://sociologi.cjb.net) <ha...@so...>
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