The following issue has been ASSIGNED. ====================================================================== <https://bugtrack.alsa-project.org/alsa-bug/view.php?id=324> ====================================================================== Reported By: garden Assigned To: jcdutton ====================================================================== Project: ALSA - driver Issue ID: 324 Category: PCI - emu10k1 Reproducibility: always Severity: major Priority: normal Status: assigned Distribution: Debian sid Kernel Version: 2.6.5 ====================================================================== Date Submitted: 06-06-2004 13:17 CEST Last Modified: 06-30-2006 18:23 CEST ====================================================================== Summary: Audigy2 Platinum: very low volume (both in and out) Description: Both the input and output levels of my Audigy2 Platinum seem to be very low if compared to the same card with Windows (win98se). For example, I connected an external source (a MD player with very loud music in the disc) to the optical input, then to the aux input, then to the aux2 input. With the mixer settings to 100% the input level still does not go over 20-25% of the maximum amplitude (while with Windows I have to lower the input level or it will be too high). The same thing applies to the output level of my analog speakers. [I must be *very* careful when I reboot with Windows and must not forget to turn the volume knob from 10 to 2]. I had exactly the same problem when I used the emu10k1 drivers from sourceforge. ====================================================================== ---------------------------------------------------------------------- garden - 09-14-04 15:24 ---------------------------------------------------------------------- Just to keep things updated: the problem stays there also with 2.6.8.1 and ALSA 1.0.7rc1 (not compiled with the kernel). ---------------------------------------------------------------------- pzad - 09-16-04 10:16 ---------------------------------------------------------------------- Driver only attenuate signals. If you set volumes of inputs and output to 100, then you get what is exactly on input. Windows drivers probably amplify inputs or outputs. Could you attach output of amixer ???? ---------------------------------------------------------------------- garden - 09-16-04 11:37 ---------------------------------------------------------------------- Here is my amixer output. I think it's very strange that the driver only attenuate signals... I can't believe that the maximum output from this card is so much more quiet than the output of an AWE64 (with ALSA and win95 the output volume was exactly the same). On this PC I also have an integrated sound card: 0000:00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 50) And in this case ALSA and win98 volume is quite the same. Moreover, I also have very low levels with optical *input*, and I'm sure that the original signal is near to 100% of volume. ---------------------------------------------------------------------- pzad - 09-16-04 12:17 ---------------------------------------------------------------------- >Moreover, I also have very low levels with optical *input*, and I'm sure that the >original signal is near to 100% of volume. Try to set "IEC958 Optical Capture" to 100 in alsamixer and record. Then check recorded file for signal level - maximum level - is this same as source or it is lower ??? Best will be for example with cd player (optical output connected to audigy). Recording something from this cd player. Then you should grab this directly from cd (using some cd rip app) and compare these two files if there is same volume level (They will be not same, because emu10k1 always resamples). Mixer in your other souncards are directly in hardware. On Audigy this mixer is implemented in DSP software and can be changed. Output or input can be amplifyed, but you will lose precision of your DAC or ADC. If you set for example "IEC958 Optical", Front and Master to 100. What is level compared to windows max mixer settings ??? I will check Audigy mixer if it is correct. Maybe I made some mistake. ---------------------------------------------------------------------- garden - 09-16-04 13:23 ---------------------------------------------------------------------- I tried to record a CD track (1st mov. of 5th symphony by Beethoven :-)) with a CD player with the optical output connected to the input on the audigy2 and IEC958 Capture at 100, then I tried connecting it to the RCA connectors (analog inputs, 100% volume), then I recorded it playing the CD in my CD-ROM reader (connected to the audigy2 "Audigy CD" digital input, 100% volume), then I ripped it with cdparanoia. These are the results (well, I think I went wrong with "very low level". It appears just to be "lower".) arecord (IEC958 optical input, Sony MXD-D1) Maximum amplitude: 0.835510 Minimum amplitude: -0.828491 arecord (Aux IN 2 on the front panel, Sony MXD-D1) Maximum amplitude: 0.727905 Minimum amplitude: -0.715240 arecord (AudigyCD digital audio CD input, LiteON something DVD-ROM) Maximum amplitude: 0.832703 Minimum amplitude: -0.828522 cdparanoia: Maximum amplitude: 0.933868 Minimum amplitude: -0.923676 As for the comparison windows vs linux, I'll reboot in a few minutes then I'll post the results. ---------------------------------------------------------------------- jdthood - 08-30-05 12:23 ---------------------------------------------------------------------- Hi. What's the status of this bug. Any improvement in later ALSA releases? ---------------------------------------------------------------------- garden - 08-30-05 12:32 ---------------------------------------------------------------------- No changes for me. It is still quite low. ---------------------------------------------------------------------- rlrevell - 08-30-05 20:21 ---------------------------------------------------------------------- When you say Windows do you mean with the Creative driver? Unfortunately it's a black box. Do you get the same results with this (vastly superior) driver: http://www.kxproject.com If so then we can compare the AC97 registers. ---------------------------------------------------------------------- pzad - 08-31-05 14:01 ---------------------------------------------------------------------- This is not in AC97 - it is used only for recording - and is already on max. I think diffrence are in DSP code. ---------------------------------------------------------------------- rlrevell - 08-31-05 18:54 ---------------------------------------------------------------------- Could this be related to the "x4" stuff in the kX driver? Inputs from the ADC are multiplied by 4 (since the ADC is 16 bit and the DSP 32 bit) then divided by 4 at the output. ---------------------------------------------------------------------- pzad - 01-26-06 21:52 ---------------------------------------------------------------------- I played with DSP and if everything is on 100 % then you get (when recording) on output of DSP same amplitude of signal as on input. Playback can be diffrent and can be lower than in windows, but I don't know, if it is, how much. ---------------------------------------------------------------------- rlrevell - 01-26-06 21:55 ---------------------------------------------------------------------- OK, so NOTABUG? ---------------------------------------------------------------------- pzad - 01-26-06 22:03 ---------------------------------------------------------------------- For now keep this bug open. Recording from "mic in" is lower (compared to windows). I will post patch (capture gain on AC97 needs to be set to 3-6 dB). Recording from PCM is OK - when all volumes set 100% if you record PCM you will get same recording volume as it was played. I need to check recording from "line in" and playback part. ---------------------------------------------------------------------- killrbuckeye - 06-19-06 16:33 ---------------------------------------------------------------------- pzad made me aware of this issue after I reported the problem in the Creative forum. I have the same symptoms as garden: very low capture volumes with the Line-level inputs Aux2 (stereo RCA) and Line2 (1/4"), even with all the ALSA capture volumes set to 100%. I can make the signals clip in Windows, so I know my source levels are more than adequate. ---------------------------------------------------------------------- snover - 06-21-06 23:19 ---------------------------------------------------------------------- I am experiencing a similar issue running 2.6.15 (2.6.15-25-amd64-k8) and ALSA 1.0.10rc3 (Kubuntu Dapper 6.06) where the input levels are very very low. Also, the "Line In 1/Mic 1" on the breakout box is mapped to Line2 in ALSA, so "Mic Boost" does not work. $ cat /proc/asound/cards 0 [Audigy2 ]: Audigy2 - Audigy 2 ZS [2001] Audigy 2 ZS [2001] (rev.4, serial:0x20011102) at 0xc800, irq 74 ---------------------------------------------------------------------- killrbuckeye - 06-30-06 16:32 ---------------------------------------------------------------------- pzad: is this issue ever going to be addressed (we're approaching the two-year mark), or should I just give up on using Linux for audio recording with my Audigy? ---------------------------------------------------------------------- jcdutton - 06-30-06 18:22 ---------------------------------------------------------------------- Known problem. The problem is due to the way sound is routed. This has been fixed for one creative sound card so far. I will upload a patch to try when I get a moment. Issue History Date Modified Username Field Change ====================================================================== 06-06-04 13:17 garden New Issue 06-06-04 13:17 garden Distribution => Debian sid 06-06-04 13:17 garden Kernel Version => 2.6.5 06-28-04 09:17 pzad Status new => assigned 06-28-04 09:17 pzad Assigned To => pzad 09-14-04 15:24 garden Note Added: 0001758 09-16-04 10:16 pzad Note Added: 0001766 09-16-04 11:32 garden File Added: amixer.out 09-16-04 11:37 garden Note Added: 0001769 09-16-04 12:17 pzad Note Added: 0001772 09-16-04 13:23 garden Note Added: 0001773 08-30-05 12:23 jdthood Note Added: 0005975 08-30-05 12:32 garden Note Added: 0005978 08-30-05 20:21 rlrevell Note Added: 0005981 08-31-05 14:01 pzad Note Added: 0005988 08-31-05 18:54 rlrevell Note Added: 0005990 01-26-06 21:52 pzad Note Added: 0007789 01-26-06 21:55 rlrevell Note Added: 0007790 01-26-06 22:03 pzad Note Added: 0007791 01-28-06 23:11 andred Issue Monitored: andred 06-19-06 16:33 killrbuckeye Note Added: 0010316 06-19-06 16:34 killrbuckeye Issue Monitored: killrbuckeye 06-21-06 23:18 snover Note Added: 0010409 06-21-06 23:19 snover Issue Monitored: snover 06-21-06 23:19 snover Note Edited: 0010409 06-30-06 16:32 killrbuckeye Note Added: 0010739 06-30-06 16:34 pzad Assigned To pzad => 06-30-06 18:22 jcdutton Note Added: 0010750 06-30-06 18:23 jcdutton Assigned To => jcdutton ====================================================================== Using Tomcat but need to do more? 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