From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH 3/8] McBSP: OMAP3: Add Sidetone feature Date: Mon, 12 Oct 2009 10:12:34 +0100 Message-ID: <20091012091234.GB3308@rakim.wolfsonmicro.main> References: <1255003137-1034-1-git-send-email-eduardo.valentin@nokia.com> <1255003137-1034-4-git-send-email-eduardo.valentin@nokia.com> <20091008131702.GC29176@rakim.wolfsonmicro.main> <1255064967.30157.178.camel@eenurkka-desktop> <20091009104458.GB5082@sirena.org.uk> <1255328261.30157.227.camel@eenurkka-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1255328261.30157.227.camel@eenurkka-desktop> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: Eero Nurkkala Cc: "alsa-devel@alsa-project.org" , ext Tony Lindgren , "Valentin Eduardo (Nokia-D/Helsinki)" , "Ujfalusi Peter (Nokia-D/Tampere)" , Linux-OMAP , ALSA-Devel List-Id: linux-omap@vger.kernel.org On Mon, Oct 12, 2009 at 09:17:41AM +0300, Eero Nurkkala wrote: > Indeed. If I'm not totally wrong, the sidetone engineering is such, > that the sinetones should be of constant volume (this may depend on > the usecase). So, let's say we have the TPA6130 codec's volume used > along with a sidetone: > 1. A change in TPA6130 volume should lead to a change in > the sidetone's gain (if it's enabled). The change of gain > is directly related to the change in the TPA's volume. Could you go into more detail about why there should be a relationship between the two gains?