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Commit 19739fef authored by Thibault LE MEUR's avatar Thibault LE MEUR Committed by Jaroslav Kysela
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[ALSA] Fixes typos in Audiophile-USB.txt 



Modules: Documentation

Fixes typos in Audiophile-USB.txt.

Signed-off-by: default avatarThibault LE MEUR <Thibault.LeMeur@supelec.fr>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 01a00e5e

Documentation/sound/alsa/Audiophile-Usb.txt

+16 −13
Original line number Diff line number Diff line 
	Guide to using M-Audio Audiophile USB with ALSA and Jack	v1.1

	Guide to using M-Audio Audiophile USB with ALSA and Jack	v1.2

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



	    Thibault Le Meur <Thibault.LeMeur@supelec.fr>
@@ -13,6 +13,9 @@ of the device. 


The device has 4 audio interfaces, and 2 MIDI ports:

 * Analog Stereo Input (Ai)

   - This port supports 2 pairs of line-level audio inputs (1/4" TS and RCA) 

   - When the 1/4" TS (jack) connectors are connected, the RCA connectors

     are disabled

 * Analog Stereo Output (Ao)

 * Digital Stereo Input (Di)

 * Digital Stereo Output (Do)
@@ -42,7 +45,7 @@ Important facts about the Digital interface: 
though I haven't tested it under linux

   - Note that in this setup only the Do interface can be enabled

 * Apart from recording an audio digital stream, enabling the Di port is a way 

to syncrhonize the device to an external sample clock

to synchronize the device to an external sample clock

   - As a consequence, the Di port must be enable only if an active Digital 

source is connected

   - Enabling Di when no digital source is connected can result in a
@@ -180,7 +183,7 @@ IMPORTANT NOTE WHEN SWITCHING CONFIGURATION: 
     or changing modprobe.conf)

   - turn on the device



2.2.2.3 - Setting and switching configurations with the device_setup parameter

2.2.2.3 - Audiophile USB's device_setup structure



If you want to understand the device_setup magic numbers for the Audiophile 

USB, you need some very basic understanding of binary computation. However,
@@ -226,7 +229,7 @@ Caution: 
   - choosing b2 will prepare all interfaces for 24bits/96kHz but you'll

     only be able to use one at the same time



2.2.3 -  Technical Details for Audiophile Usb 

2.2.3 -  USB implementation details for this device



You may safely skip this section if you're not interrested in driver 

development.
@@ -234,20 +237,20 @@ development. 
This section describes some internals aspect of the device and summarize the 

data I got by usb-snooping the windows and linux drivers.



The M-Audio Audiophile USB has 7 Usb Interfaces:

The M-Audio Audiophile USB has 7 USB Interfaces:

a "USB interface":

 * Usb Interface nb.0

 * Usb Interface nb.1

 * USB Interface nb.0

 * USB Interface nb.1

   - Audio Control function

 * Usb Interface nb.2

 * USB Interface nb.2

   - Analog Output

 * Usb Interface nb.3

 * USB Interface nb.3

   - Digital Output

 * Usb Interface nb.4

 * USB Interface nb.4

   - Analog Input

 * Usb Interface nb.5

 * USB Interface nb.5

   - Digital Input

 * Usb Interface nb.6

 * USB Interface nb.6

   - MIDI interface compliant with the MIDIMAN quirk 



Each interface has 5 altsettings (AltSet 1,2,3,4,5) except:
@@ -326,5 +329,5 @@ atid=425939 


After having applied the patch you can run jackd with the following command 

line:

# /usr/local/bin/jackd -R -dalsa -Phw:1,0 -r48000 -p128 -n2 -D -Chw:1,1

  % jackd -R -dalsa -Phw:1,0 -r48000 -p128 -n2 -D -Chw:1,1