From: Raymond Yau <superquad.vortex2@gmail.com>
To: ALSA Development Mailing List <alsa-devel@alsa-project.org>
Subject: Re: wrong decibel data?
Date: Wed, 7 Apr 2010 08:34:14 +0800 [thread overview]
Message-ID: <l2y4f3252891004061734w9b710450ic6661ff8b2e630f9@mail.gmail.com> (raw)
In-Reply-To: <q2z98391a7b1004060101kd5ffef92tf4d98faa62a3ad5b@mail.gmail.com>
2010/4/6 Nicolo' Chieffo <nicolo.chieffo@gmail.com>
> I've already attached my alsa-info.log in my first post.
>
>
> * alsamixer -3 dB (94%):
> Simple mixer control 'Master',0
> Capabilities: pvolume pswitch pswitch-joined penum
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 65536
> Mono:
> Front Left: Playback 57079 [87%] [on]
> Front Right: Playback 57079 [87%] [on]
>
> * alsamixer 0 dB (100%):
> Simple mixer control 'Master',0
> Capabilities: pvolume pswitch pswitch-joined penum
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 65536
> Mono:
> Front Left: Playback 64044 [98%] [on]
> Front Right: Playback 64044 [98%] [on]
>
you should notice that 0dB of Pulseaudio volume control is not at the
maximum dB
i.e. ( floating point 1.0 is not at 100% any more , seem that floating
point 0 (-inf dB) is also not at 0% point too )
http://thread.gmane.org/gmane.linux.alsa.devel/70545/focus=70585
>> As mentioned for the PA case I decided to shift 0dB to max
amplification in any case, which I think is a workable way to avoid this
problem.
how about "dbmeasure pulse" and "dbmeasure hw:0,0" ?
next prev parent reply other threads:[~2010-04-07 0:34 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-02 18:21 wrong decibel data? Nicolo' Chieffo
2010-04-02 20:25 ` Nicolo' Chieffo
2010-04-03 10:09 ` Colin Guthrie
2010-04-03 10:48 ` Nicolo' Chieffo
2010-04-05 0:15 ` Raymond Yau
2010-04-05 8:29 ` Stereo Support in APLAY Reddy, MR Swami
2010-04-08 6:47 ` Clemens Ladisch
2010-04-04 0:09 ` wrong decibel data? Raymond Yau
2010-04-04 1:31 ` Raymond Yau
2010-04-06 0:07 ` Raymond Yau
2010-04-08 1:35 ` Raymond Yau
2010-04-16 13:48 ` Raymond Yau
2010-04-17 9:31 ` Colin Guthrie
2010-04-21 2:32 ` Raymond Yau
2010-04-21 8:06 ` Colin Guthrie
2010-04-22 1:16 ` Raymond Yau
2010-05-27 13:30 ` Colin Guthrie
2010-05-27 13:48 ` Clemens Ladisch
2010-05-27 14:43 ` Colin Guthrie
2010-05-27 17:21 ` Colin Guthrie
2010-06-06 0:12 ` Raymond Yau
2010-06-07 9:03 ` Colin Guthrie
2010-06-08 0:47 ` Raymond Yau
2010-06-08 15:30 ` Colin Guthrie
2010-06-10 3:16 ` Raymond Yau
2010-06-10 16:11 ` Colin Guthrie
2010-06-13 13:53 ` Lennart Poettering
2010-06-14 0:25 ` Raymond Yau
2010-06-14 8:33 ` Colin Guthrie
2010-06-14 8:38 ` Raymond Yau
2010-06-14 8:45 ` Raymond Yau
2010-06-14 10:17 ` Colin Guthrie
2010-06-14 18:38 ` Lennart Poettering
2010-06-14 8:56 ` James Courtier-Dutton
2010-06-14 9:54 ` Raymond Yau
2010-06-14 10:07 ` James Courtier-Dutton
2010-06-15 6:57 ` Raymond Yau
2010-06-14 18:46 ` Lennart Poettering
2010-06-14 10:22 ` Colin Guthrie
2010-06-14 10:46 ` James Courtier-Dutton
2010-06-14 11:03 ` Colin Guthrie
2010-06-14 11:29 ` Alan Horstmann
2010-06-14 12:36 ` Raymond Yau
2010-06-14 14:17 ` Colin Guthrie
2010-06-14 15:27 ` James Courtier-Dutton
2010-06-14 15:44 ` Colin Guthrie
2010-06-14 16:09 ` Mark Brown
2010-06-15 0:11 ` Raymond Yau
2010-06-22 2:31 ` Raymond Yau
2010-06-22 9:15 ` Colin Guthrie
2010-06-22 15:29 ` Raymond Yau
2010-06-22 17:05 ` Colin Guthrie
2010-06-23 1:15 ` Raymond Yau
2010-06-23 9:12 ` Colin Guthrie
2010-06-28 1:47 ` Raymond Yau
2010-06-28 8:18 ` Colin Guthrie
2010-07-01 15:03 ` Raymond Yau
2010-06-14 18:54 ` Lennart Poettering
2010-06-14 18:49 ` Lennart Poettering
2010-06-14 23:43 ` Raymond Yau
2010-06-15 16:10 ` Colin Guthrie
2010-06-14 18:41 ` Lennart Poettering
2010-06-08 4:01 ` Raymond Yau
2010-06-08 15:40 ` Colin Guthrie
2010-05-28 2:37 ` Raymond Yau
2010-05-28 2:04 ` Raymond Yau
2010-04-06 1:46 ` Raymond Yau
2010-04-06 8:01 ` Nicolo' Chieffo
2010-04-07 0:34 ` Raymond Yau [this message]
2010-04-07 8:17 ` Nicolo' Chieffo
2010-04-07 12:17 ` Nicolo' Chieffo
2010-04-07 23:38 ` Raymond Yau
2010-04-08 2:05 ` Raymond Yau
2010-04-08 12:42 ` Nicolo' Chieffo
2010-04-08 23:11 ` Raymond Yau
2010-04-09 7:30 ` Nicolo' Chieffo
2010-04-09 11:37 ` Raymond Yau
2010-04-09 11:40 ` Raymond Yau
2010-04-09 12:27 ` Nicolo' Chieffo
2010-06-24 9:53 ` Raymond Yau
2010-04-09 13:49 ` Raymond Yau
2010-04-09 13:59 ` Nicolo' Chieffo
2010-04-09 18:35 ` Nicolo' Chieffo
2010-04-10 0:27 ` Raymond Yau
2010-04-10 9:27 ` Raymond Yau
2010-04-10 9:41 ` Nicolo' Chieffo
2010-04-10 23:32 ` Raymond Yau
2010-04-11 0:02 ` Raymond Yau
2010-04-11 9:00 ` Nicolo' Chieffo
2010-04-15 3:38 ` Raymond Yau
2010-04-14 1:39 ` Raymond Yau
[not found] ` <4BBF5F81.1010205@yellowcouch.org>
2010-04-09 23:32 ` Raymond Yau
2010-04-10 6:56 ` Werner Van Belle
2010-04-10 7:23 ` Raymond Yau
2010-04-10 4:25 ` Raymond Yau
2010-04-10 6:59 ` Werner Van Belle
2010-04-10 0:11 ` Raymond Yau
2010-04-17 0:40 ` Raymond Yau
2010-04-09 0:49 ` Raymond Yau
2010-04-09 1:35 ` Raymond Yau
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