Here is my mail without attachments. I hope it gets through this time. Na 25. 11. 2010 11:25, Bill Unruh je pisal: > > On Wed, 24 Nov 2010, Grega Fajdiga wrote: > > >> >> >> >> >> >> Na 24. 11. 2010 15:35, Bill Unruh je pisal: >> >> >>> >>> That is probably what is called feedback.i It says yor microphone works. >>> >>> Unplug your headphones/speakers. >>> >>> Ie, turn off all output. So set both to Mic. >>> >>> Now record. Once you have recorded Turn off the inputs. and see if there is >>> >>> some recording. Or use something like audacity and look at the input meter. >>> >>> >>> >>> >> >> >> >> I tried turning both on and no change, I get nothing but silence >> >> just as before. Also, the screeching is very loud and unbearable. >> >> It doesn't occur in Win 7 though. > > > > I understand that you are making the last statement just to tell us that it is > > not an unsurmountable hardware fault in the sound card. Other than that it Correct. Creative's Windows driver seems to able to automatically manage volume controls. It displays (unmutes?) only those controls in which a device is attached. For comparison with Linux controls below, here are available Windows controls: ïPlayback: Speakers (set to default) Digital Audio Interface (disabled) Recording: Microphone (set to default) Line-in (disabled) Auxiliary (disabled) S/PDIF in (disabled) By disabled I mean greyed-out. > > gives zero clues as to what might be wrong. > > The screeching is almost certainly feedback of some sort. The frequency would > > give an estimate of the feedback time, although it sounds like the system is > > limiting ( highly non-linear regime) in which case the relation between the > > feedback frequency and the feedback time is more problematic. So, what kind > > of frequency is that screech? And when it screeches, can you record it? What > > do you have plugged into the inputs and do you have speakers/headphones/... > > plugged into the outputs? I'll try to find a dictaphone later and provide a recording of the noise. I have the 2.1 speaker system and the headphones attached to the green Front speakers output at the same time via an audio Y-splitter, which in my case isn't a cable, just a connector with two holes and one male jack to plug it into the green hole. The mike from the headphones is plugged into the blue Mic/Line in hole. See here: http://pdfguides.com/creative-labs-sound-blaster-audigy-se-features-specifications.html > > > > You said "I tried turning both on". Since I told you to try a whole bunch of > > things, that "both" has no referent. Yes, my bad. Let me give you a complete rundown of all the available controls in Linux: Output controls (Playback): Master (100/100) All S/PDIF controls muted or volume set to 0/0 Analog Center/LFE: muted Analog Front: 100/100 Analog Rear: muted Analog Side: muted CAPTURE Feedback: 0/0 Thorough testing I found out that the CAPTURE control is the one that causes screeching if it is set to volume above 60. CAPTURE cannot be muted. Input controls (Capture): Line in: 0/0 Mic: 100/100 Phone: 0/0 Aux: 0/0 Then there are three more controls, which do not have a VU meter at all. I can only toggle them between respective values. These controls and their possible values are: 1. Analog source: a) Mic b) Line in c) Aux d) Phone Currently set to Mic 2. Digital Source: a) IEC958 out b) i2s mixer out c) IEC 958 in d) i2s in e) AC97 in f) SRC out Currently set to AC97 in 3. Shared Mic/Line in a) Line in b) Mic in Currently set to Mic in. When I said that "both are set to Mic" in the previous mail, I meant controls 1 and 3. Neither of the input controls can be muted and with the last three controls one the values must be set (i.e. it is not possible to set them to NONE). > > I told you to turn ALL of the outputs off (pull all the sliders for the > > outputs to zero-- ALL Every one.). Now for the inputs select the MIC for all > > the inputs and push the sliders up. Plug a microphone into the input. Try > > recording. Ah, now I get it. I tried muting/setting to zero all outputs and recording some sound but there was no change in meter fluctuation (i.e. there wasn't any. > > Does the recording level meter fluctate?. >> >> Nope, no fluctuation at all. I also attached outputs from "sound device info" command in Audacity both in Linux and Windows in case that helps. Thanks, -- Grega Fajdiga Hacquetova 5 1113 Ljubljana GSM: +386 40 923 635 E-poÅta: Gregor.Fajdiga@xxxxxxxxxxxxxx ------------------------------------------------------------------------------ Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! Tap into the largest installed PC base & get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
