ALSA: doc: ReSTize README.maya44

   audiophile-usb

   mixart

   bt87x

   maya44

NOTE: The following is the original document of Rainer's patch that the

=================================

Notes on Maya44 USB Audio Support

=================================

.. note::

   The following is the original document of Rainer's patch that the

   current maya44 code based on.  Some contents might be obsoleted, but I

   keep here as reference -- tiwai

----------------------------------------------------------------

Feb 14, 2008

Rainer Zimmermann <mail@lightshed.de>

STATE OF DEVELOPMENT:

STATE OF DEVELOPMENT

====================

This driver is being developed on the initiative of Piotr Makowski (oponek@gmail.com) and financed by Lars Bergmann.

Development is carried out by Rainer Zimmermann (mail@lightshed.de).

- Ardour 2.1 seems to work only via JACK, not using ALSA directly or via OSS. This still needs to be tracked down.

DRIVER DETAILS:

DRIVER DETAILS

==============

the following files were added:

pci/ice1724/maya44.c        - Maya44 specific code

pci/ice1724/maya44.h

pci/ice1724/ice1724.patch

pci/ice1724/ice1724.h.patch - PROPOSED patch to ice1724.h (see SAMPLING RATES)

i2c/other/wm8776.c  - low-level access routines for Wolfson WM8776 codecs 

include/wm8776.h

* pci/ice1724/maya44.c - Maya44 specific code

* pci/ice1724/maya44.h

* pci/ice1724/ice1724.patch

* pci/ice1724/ice1724.h.patch - PROPOSED patch to ice1724.h (see SAMPLING RATES)

* i2c/other/wm8776.c - low-level access routines for Wolfson WM8776 codecs 

* include/wm8776.h

Note that the wm8776.c code is meant to be card-independent and does not actually register the codec with the ALSA infrastructure.

the following files were created in pci/ice1724, simply #including the corresponding file from the alsa-kernel tree:

wtm.h

vt1720_mobo.h

revo.h

prodigy192.h

pontis.h

phase.h

maya44.h

juli.h

aureon.h

amp.h

envy24ht.h

se.h

prodigy_hifi.h

* wtm.h

* vt1720_mobo.h

* revo.h

* prodigy192.h

* pontis.h

* phase.h

* maya44.h

* juli.h

* aureon.h

* amp.h

* envy24ht.h

* se.h

* prodigy_hifi.h

*I hope this is the correct way to do things.*

SAMPLING RATES:

SAMPLING RATES

==============

The Maya44 card (or more exactly, the Wolfson WM8776 codecs) allow a maximum sampling rate of 192 kHz for playback and 92 kHz for capture.

The proposed code (currently deactivated) is in ice1712.h.patch, ice1724.c and maya44.c (in pci/ice1712).

SOUND DEVICES:

SOUND DEVICES

=============

PCM devices correspond to inputs/outputs as follows (assuming Maya44 is card #0):

hw:0,0 input - stereo, analog input 1+2

hw:0,0 output - stereo, analog output 1+2

hw:0,1 input - stereo, analog input 3+4 OR S/PDIF input

hw:0,1 output - stereo, analog output 3+4 (and SPDIF out)

* hw:0,0 input - stereo, analog input 1+2

* hw:0,0 output - stereo, analog output 1+2

* hw:0,1 input - stereo, analog input 3+4 OR S/PDIF input

* hw:0,1 output - stereo, analog output 3+4 (and SPDIF out)

NAMING OF MIXER CONTROLS:

NAMING OF MIXER CONTROLS

========================

(for more information about the signal flow, please refer to the block diagram on p.24 of the ESI Maya44 manual, or in the ESI windows software).

PCM: (digital) output level for channel 1+2

PCM 1: same for channel 3+4

PCM

    (digital) output level for channel 1+2

PCM 1

    same for channel 3+4

Mic Phantom+48V

    switch for +48V phantom power for electrostatic microphones on input 1/2.

Mic Phantom+48V: switch for +48V phantom power for electrostatic microphones on input 1/2.

    Make sure this is not turned on while any other source is connected to input 1/2.

    It might damage the source and/or the maya44 card.

Mic/Line input: if switch is on, input jack 1/2 is microphone input (mono), otherwise line input (stereo).

Mic/Line input

    if switch is on, input jack 1/2 is microphone input (mono), otherwise line input (stereo).

Bypass

    analogue bypass from ADC input to output for channel 1+2. Same as "Monitor" in the windows driver.

Bypass 1

    same for channel 3+4.

Bypass: analogue bypass from ADC input to output for channel 1+2. Same as "Monitor" in the windows driver.

Bypass 1: same for channel 3+4.

Crossmix

    cross-mixer from channels 1+2 to channels 3+4

Crossmix 1

    cross-mixer from channels 3+4 to channels 1+2

Crossmix: cross-mixer from channels 1+2 to channels 3+4

Crossmix 1: cross-mixer from channels 3+4 to channels 1+2

IEC958 Output

    switch for S/PDIF output.

IEC958 Output: switch for S/PDIF output.

    This is not supported by the ESI windows driver.

    S/PDIF should output the same signal as channel 3+4. [untested!]

Digitial output selectors:

Digitial output selectors

    These switches allow a direct digital routing from the ADCs to the DACs.

    Each switch determines where the digital input data to one of the DACs comes from.

    They are not supported by the ESI windows driver.

    For normal operation, they should all be set to "PCM out".

H/W: Output source channel 1

H/W 1: Output source channel 2

H/W 2: Output source channel 3

H/W 3: Output source channel 4

H/W

    Output source channel 1

H/W 1

    Output source channel 2

H/W 2

    Output source channel 3

H/W 3

    Output source channel 4

H/W 4 ... H/W 9

    unknown function, left in to enable testing.

H/W 4 ... H/W 9: unknown function, left in to enable testing.

    Possibly some of these control S/PDIF output(s).

    If these turn out to be unused, they will go away in later driver versions.

Selectable values for each of the digital output selectors are:

   "PCM out" -> DAC output of the corresponding channel (default setting)

   "Input 1"...

   "Input 4" -> direct routing from ADC output of the selected input channel

--------

Feb 14, 2008

Rainer Zimmermann

mail@lightshed.de

PCM out

	DAC output of the corresponding channel (default setting)

Input 1 ... Input 4

	direct routing from ADC output of the selected input channel