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d="scan'208";a="161419515" Received: from 76-10-130-57.dsl.teksavvy.com (HELO mail.hacklava.net) ([76.10.130.57]) by smtp11.teksavvy.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 11 Apr 2021 12:01:59 -0400 Received: from [192.168.1.24] (unknown [192.168.1.24]) (Authenticated sender: marc@hacklava.net) by mail.hacklava.net (Postfix) with ESMTPSA id BECEE34A for ; Sun, 11 Apr 2021 12:01:52 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hacklava.net; s=mail; t=1618156918; bh=jntPDkaT16EW3HN/mfuI4tu/Z+NNiibSkvESR6qizhA=; h=To:From:Subject:Date:From; b=3oA+25o7UZcS3NUAs/Wk7EWIV7juVjQ8LVxiVUviTf5bUMnByws+tYvLgiHfHx6/z zQyohfCLCGMlqJQf1gm/Ari90C9jjRV4oR8jXHfiphwkFJY1gFKtn3y+dYsWJf/d63 WqY/RNLhC/M5mxh+pOcMmlZfmkbyYITidC6mNH3nLr+hMwf8wXL5Kw0TCd5UoJp0PT HQfR96IDgWW94OnUUJ6Ce5d5w0/JkvY9Gpkx8p8F//0jh2vCJ4Je554l7taoOJFGn5 KCh0EFbURz03OWJBTWPL9a0cIqBNRvFg0lKbydhv+0A1rI0XuY4Wzc/ohh6TweDem0 hFiqIBARFkzCw== To: alsa-devel@alsa-project.org From: =?UTF-8?Q?Marc_Lavall=c3=a9e?= Subject: advice for creating special ALSA driver or plugin Message-ID: Date: Sun, 11 Apr 2021 12:01:51 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Hi ALSA developers. I'm completely new to ALSA developing, so I'm being lazy and ask for advices. I have a USB recording device for four 16bit/48Khz channels, "encoded" in a stereo 16bit/96Khz track; because it is a USB audio recording device, so no special recording software is required, but a (proprietary Windows) converting software is provided (that I can't use). Output channels are alternated at the sample level: L: 1313131313, R: 2424242424, etc... So basically the driver/plugin would alternates between input samples of a stereo track to output 4 channels (at half the input sample rate). Is there a code base I could study and adapt to start my simple project? Thanks for your attention. Marc