Re: [Line6linux-user] The HD500

[Sébastien C. <nes...@gm...>]

I finally had some time to work on this. I did a little snooping, with
>
> USB snoop, and I have done some work deciphering the tone data.
>
>
>> The audio looks like it is probably similar to the X3 and X3PRO, since
>
> it uses the same end points (0x02 and 0x86), while all the other PODs
>
> appear to use other endpoints. However, it looks like X3 and X3PRO
>
> support in the driver is incomplete. I added the HD500's USB ID to the
>
> driver. When I plug in the HD500 I get 2 card directories in
>
> /proc/asound, but these devices are not listed in /proc/asound/devices
>
> or /proc/asound/cards. I'm not that familiar with the Linux USB and ALSA
>
> mechanisms, so it might take quite a bit of study for me to get much
>
> further.
>
>
>> The control also looks like it may resemble the X3 and X3PRO, as it uses
>
> the same end points (0x01 and 0x81). I can follow the control
>
> information with my limited USB knowledge. I've done quite a bit of work
>
> figuring out the details of the tone data. The data exchanged with the
>
> POD is basically the same as the data stored in the tone files. They
>
> byte reverse all the floating point values in the files, and a few bits
>
> seem to be different, but the great majority is the same. I worked my
>
> way through the parameters and I now know what most of the data in the
>
> tone files actually means. I have a crude program which can dump it out.
>
>
>> If there is any available information which might help make the audio
>
> spring to life, that would be extremely useful.
>
>
>> Steve
>
>

I've also tried that and same result .
I added  :

#define LINE6_DEVID_PODHD500      0x414d
#define LINE6_BIT_PODHD500        (1 << 17)

to the usbdefs.h

and added thos to driver.c and pcm.c just below the LINE6_DEVID_PODX3 ones

A card5 (that's correct) directory is created under /proc/asoundrc/ but the
card isn't registered in alsa

ll /proc/asound/card5/
total 0
dr-xr-xr-x 3 root root 0 24 oct.  19:04 pcm0c
dr-xr-xr-x 3 root root 0 24 oct.  19:04 pcm0p
ll /proc/asound/card5/pcm0c/
total 0
-r--r--r-- 1 root root 0 24 oct.  19:04 info
dr-xr-xr-x 2 root root 0 24 oct.  19:04 sub0
cat /proc/asound/card5/pcm0c/info
card: 5
device: 0
subdevice: 0
stream: CAPTURE
id: POD HD500
name: POD HD500
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

cat /proc/asound/card5/pcm0c/sub0/status
closed
cat /proc/asound/card5/pcm0c/sub0/hw_params
closed
cat /proc/asound/card5/pcm0c/sub0/sw_params
closed


I'll post an usb snoop later