Re: Testing freerunner's audio quality
Gennady Kupava g...@bsdmn.com writes: Many gossips flying around about bad fr's audio subsystem quality. I promised to proove that FR audio subsystem is good, just default headphones quality below anything. I thought we did the bassfix on this device, didn't we? That makes hell of a difference, i tried comparing my bassfixed FR with a factory one and it was stunning how much they differ. -- Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software! mailto:fercer...@gmail.com ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
Hi, thanks a lot for your efforts. I tried to reproduce the issue by playing sound with both my PC and FR (gta02V5+buzzfix) using the same Sony MDR CD380 headphones. FR was using the attached headset.state with andy-tracking a3587e4ed77974ad and http://www.dealextreme.com/details.dx/sku.3541 as a 2.5mm to 3.5mm adapter (should not affect sound quality but I thought I'd mention it still..) Gennady Kupava g...@bsdmn.com writes: http://www.bsdmn.com/openmoko/audioquality/white.wav Both sound like white noise, can not hear any difference :-) 1. Original piece of song (piano+voice): http://www.bsdmn.com/openmoko/audioquality/song.wav I can not hear a difference. Next I tried http://he3.magnatune.com/all/01-Welcome%20Dance-iNTROSPEKT.ogg At 00:64 I can hear a clear difference. With PC the bass is loud and smooth. With FR it is a lot less loud and sounds unnaturally discant. Can you confirm? headset.state Description: Binary data ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
jeremy jozwik jerjoz.for...@gmail.com writes: now make the speaker actually loud enough. Gennady was talking about audio playback of files. i used to be able to do this in mickey term, but that has since disappeared. What exactly did you do in mickey term? What software are you using to control GSM? (frameworkd? cornucopia? qt*? gsmd?) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
On Thu, Sep 23, 2010 at 4:54 AM, Timo Juhani Lindfors timo.lindf...@iki.fi wrote: Gennady was talking about audio playback of files. i know. What exactly did you do in mickey term? What software are you using to control GSM? (frameworkd? cornucopia? qt*? gsmd?) i used to control the de-noising with mickyterm and GSM mic / speaker with gsmhandset.state. both have since disappeared or moved. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
jeremy jozwik jerjoz.for...@gmail.com writes: both have since disappeared or moved. Hmm, disappeared from where? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
On Thu, Sep 23, 2010 at 8:21 AM, Timo Juhani Lindfors timo.lindf...@iki.fi wrote: Hmm, disappeared from where? # cat /etc/shr-version SHR -20100921 Built from branch: org.openembedded.dev Revision: 56fa8d7ad350fcbb5dedaa80c656da0bb59a2e7b gsmhandset.state and mickeyterm # find / -name 'gsmhandset.state' # # mickeyterm -sh: mickeyterm: not found ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
On Thu, Sep 23, 2010 at 17:41, jeremy jozwik jerjoz.for...@gmail.com wrote: On Thu, Sep 23, 2010 at 8:21 AM, Timo Juhani Lindfors timo.lindf...@iki.fi wrote: Hmm, disappeared from where? # cat /etc/shr-version SHR -20100921 Built from branch: org.openembedded.dev Revision: 56fa8d7ad350fcbb5dedaa80c656da0bb59a2e7b gsmhandset.state and mickeyterm # find / -name 'gsmhandset.state' # # mickeyterm -sh: mickeyterm: not found Try: find / -name 'gsmhandset' mterm2 :P -- Sebastian Krzyszkowiak dos ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
jeremy jozwik jerjoz.for...@gmail.com writes: # cat /etc/shr-version SHR -20100921 Built from branch: org.openembedded.dev Revision: 56fa8d7ad350fcbb5dedaa80c656da0bb59a2e7b gsmhandset.state and mickeyterm # find / -name 'gsmhandset.state' # # mickeyterm -sh: mickeyterm: not found Ah, that's probably some SHR issue then. Sorry, I don't know much about it. File a wishlist bug asking for them to document how to modify alsa states? Meanwhile just use older version? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
В Чтв, 23/09/2010 в 06:47 +0200, Dr. H. Nikolaus Schaller пишет: Hi, the problem is the bass. Initially, It was difficult to hear differences by playing two sounds one after the other. So until you have listened music on a bass fixed Freerunner, you would say it is quite ok. I was only able to hear the difference after taking one original Freerunner and one with Bass-Fix applied. After a while you get that there *is* a difference in low frequencies. What I have done is this test: create a sinus sweeping from 10 to 100 hz. Without bass fix you can't hear it before it comes to the 50 hz range. sox -n -t wav - synth 10 sine 10-100 file.wav This can be seen on scope outputs as shown here: http://freeyourphone.de/portal_v1/viewtopic.php?f=20t=1723p=17279hilit=bass+fix#p17251 Can you please compare you device? One effect may also be the input impedance of your line card. Did you connect it in parallel to a headset? BR, Nikolaus Yeah, big sorry - my freerunner has bass-fix made by Paul (many many thanks to Paul). I wanted but seem just forgot to mention it in my letter, as it took much longer than i expected and i had to finish it a bit in hurry. Re-thinking about it today, i found also few other flaws - white noise is actually 10 seconds and white noice spectrum is really about little bit different time interval for each sample. I had to cut white noise samples to right offset and right lenght to compare them in right way. But main test is perfectly correct - song output is of high quality. But anyway, about your oscillograms (google translate is nice thing!) - it seems that in unfixed case, you have 2 times voltage diff between 40hz and 100hz, this means 3dB. Yes, this will affect sound below 100Hz, but this influence will be less than effect from earpieces. Btw, Wolfson has bass controls. interesting is it possible to compensate bass-problem with it. Or is it possible to get frequency response and feed to some alsa-plugin equaliser to correct it. Common earpieces frequency response: http://www.thg.ru/video/cheap_headphones_2007/images/sennheiser_cx300_1.png You can see that it should influence sound quality much more than FR audio subsystem. Gennady. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
On Wed, Sep 22, 2010 at 2:57 PM, Gennady Kupava g...@bsdmn.com wrote: Hi, list, ok, now make the speaker actually loud enough to hear and the mic good enough for others to hear me. i used to be able to do this in mickey term, but that has since disappeared. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
Hi, the problem is the bass. Initially, It was difficult to hear differences by playing two sounds one after the other. So until you have listened music on a bass fixed Freerunner, you would say it is quite ok. I was only able to hear the difference after taking one original Freerunner and one with Bass-Fix applied. After a while you get that there *is* a difference in low frequencies. What I have done is this test: create a sinus sweeping from 10 to 100 hz. Without bass fix you can't hear it before it comes to the 50 hz range. sox -n -t wav - synth 10 sine 10-100 file.wav This can be seen on scope outputs as shown here: http://freeyourphone.de/portal_v1/viewtopic.php?f=20t=1723p=17279hilit=bass+fix#p17251 Can you please compare you device? One effect may also be the input impedance of your line card. Did you connect it in parallel to a headset? BR, Nikolaus Am 22.09.2010 um 23:57 schrieb Gennady Kupava: Hi, list, Many gossips flying around about bad fr's audio subsystem quality. I promised to proove that FR audio subsystem is good, just default headphones quality below anything. As today finally i overcome my lazyness and soldered 2.5mm-3.5mm jack, and i am almost content with high sound quality of my Sennheiser CX300 II+FR, i decided to do some basic testing. Test environment I got 2 recodings - 60 seconds of white noise and 120 seconds of piano +voice, audacity to do spectrum analisys, cable 3,5mm-3,5mm to connect my old m-audio revolution 7.1 card to line-in to freerunner. White noise === 1. White noise were generated by audacity original file: http://www.bsdmn.com/openmoko/audioquality/white.wav Spectrum: http://www.bsdmn.com/openmoko/audioquality/whitenoise.png 2. Same noise recorded then audio-out were connected to audio-in of sound card: http://www.bsdmn.com/openmoko/audioquality/rec_white_directcable.wav Spectrum: http://www.bsdmn.com/openmoko/audioquality/whitenoise_direct.png 3. Same noise played on FR, connected to line-in of sound card: http://www.bsdmn.com/openmoko/audioquality/rec_white_fromfrerunner.wav Spectrum: http://www.bsdmn.com/openmoko/audioquality/whitenoise_fr.png Conclusion on white noise: I see no frequency cut-offs. spectrograms look very well and close to original file. Only exception is fall below 20Hz in fr case, but i am unsure if any headset can reproduce such frequences very well. Real song = 1. Original piece of song (piano+voice): http://www.bsdmn.com/openmoko/audioquality/song.wav Spectrum: http://www.bsdmn.com/openmoko/audioquality/song.png 2. Same file played on freerunner and captured on line-in of sound card http://www.bsdmn.com/openmoko/audioquality/rec_song_fromfr.wav Spectrum: http://www.bsdmn.com/openmoko/audioquality/song_fromfr.png Conclusion on piano+voice: I can't distingush difference in quality while replaying original file or file recorded from freerunner. Spectrum show almost no difference. Overall conclusion == Seem audio quality completely depends on quality of headphones. You may try to distiguish original song and song from fr youself, only do not forget to normalize volume before attempting to do this. regards, Gennady. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Testing freerunner's audio quality
Hi and thank you for testing. For me it never been an issue. I`m using a little customized profiles for the alsa states, and i can confirm that sound quality is great. I used freerunner as AUX source for my car audio some time ago and the quality was the same as from internal sources (e.g. from USB). On 09/22/2010 11:57 PM, Gennady Kupava wrote: Hi, list, Many gossips flying around about bad fr's audio subsystem quality. I promised to proove that FR audio subsystem is good, just default headphones quality below anything. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
