[LAU] Cracks while using Audiophile 2496

[david]

Christopher Cherrett wrote:
> -------- Original Message  --------
> Subject: Re: [LAU] Cracks while using Audiophile 2496
> From: Artem Vakhitov <temcat at mail.ru>
> To: Linux-audio-user at lists.linuxaudio.org
> Date: 03/13/2011 01:49 PM
>> I'm afraid this is on the hardware side.
>> I recently tried this card on Windows and encountered very similar 
>> symptoms.
>>
>> Regards,
>> Artem Vakhitov
>>
>> Manu wrote:
>>> Hi,
>>>
>>> I just bought an Audiophile 2496. Unfortunately, it does not work as
>>> well as I imagined. Here are the symptoms :
>>>
>>> * Simple listening (no jack, just alsa):
>>> - when I route PCM outs directly to HW outs, I here "cracks" on the
>>> right side (I don't know the precise english word to describe the
>>> noise, see below for example)
>>> - if I switch the RCA cables, the cracks change side
>>> - when I route the digital mix to HW out, I don't hear cracks
>>>
>>> * Recording (jack, no xruns):
>>> - I can record my guitar (I use the RCA analog in)
>>> - I still hear the cracks while I play and in the recorded sound
>>> (example :http://manu.mindslicer.com/export.wav). These cracks are
>>> very similar to what I hear when I listen music without jack (with PCM
>>> out -> HW out).
>>>
>>> I tried with different sets of cables and headphones.
>>>
>>> What do you think ? From what I heard, I doubt it is a
>>> software-related problem. A lot of people use the Audiophile without
>>> problem. Moreover, switching the RCAs switches the side of the cracks.
>>> I just wanted to have your opinion before sending the card back. Could
>>> it be a configuration issue ? Is it a problem with the
>>> chair-to-keyboard interface ?
>>>
>>> Thanks in advance for all the advices you can give me.
>>>
>>> Cheers,
>>> Manu
>>>
>>> Conf:
>>> -------
>>>
>>> Arch Linux 64 bits (Intel Core i5, 4 Gb RAM)
>>> M-Audio Audiophile 2496
>>> alsa 1.0.24
>>> envy24control 0.6.0
>>> jack2 1.9.6
>>> qjackctl 0.3.7
>
> Both my cards work fine without cracks.

Mine, too. One on Aptosid's RT kernel, the other on a machine without RT 
kernel.

The fact that the crackling switches sides when you change DIP switches 
makes me think there's a hardware problem with the card itself.	

-- 
David
gnome at hawaii.rr.com
authenticity, honesty, community