From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: ProVideo PV 918A - audi o device created but
 cannot capture sound
Date: Fri, 17 Jan 2014 09:47:45 +0100
Message-ID: <52D8EE31.4000304@ladisch.de>
References: <loom.20140117T085941-825@post.gmane.org>
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To: siddharth <siddharth@greenearthnetwork.in>, alsa-devel@alsa-project.org
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siddharth wrote:
> modprobe snd-bt87x load_all=1 digital_rate=48000 enable=1

You are telling the driver that the tuner chip has a digital output that
runs at 48 kHz, and this it is connected to the digital input pin of the
Bt878 chip.

> but am unable to capture sound.

Do you actually know that your hardware is constructed that way?

How exactly did you try to capture?  From which device?  (see "arecord -l")


Regards,
Clemens