Re: Bying a Freerunner with the buzz-fix on it
Am So 19. April 2009 schrieb Daniel Willmann: On Wed, 15 Apr 2009 01:09:15 -0300 Werner Almesberger wer...@openmoko.org wrote: Joerg Reisenweber wrote: There's a way to detect buzzfix by rapidly switching on and off MICBIAS and testing if you hear some buzz when recording from builtin mic. Werner has created a small program to do the switching job. I'm actually not sure if this approach works. You can hear the ~40-50 Hz buzz that program (*) generates well enough, but when I added a buzzfix capacitor, that artificial noise was still there. It could be that I did something wrong, though, including not actually applying the buzz fix. Maybe switching MICBIAS on and off creates an amplitude orders of magnitudes higher than than the one introduced with GSM. yup, for sure /j signature.asc Description: This is a digitally signed message part. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
On Wed, 15 Apr 2009 01:09:15 -0300 Werner Almesberger wer...@openmoko.org wrote: Joerg Reisenweber wrote: There's a way to detect buzzfix by rapidly switching on and off MICBIAS and testing if you hear some buzz when recording from builtin mic. Werner has created a small program to do the switching job. I'm actually not sure if this approach works. You can hear the ~40-50 Hz buzz that program (*) generates well enough, but when I added a buzzfix capacitor, that artificial noise was still there. It could be that I did something wrong, though, including not actually applying the buzz fix. Maybe switching MICBIAS on and off creates an amplitude orders of magnitudes higher than than the one introduced with GSM. Regards, Daniel Willmann signature.asc Description: PGP signature ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
On Sat, Apr 04, 2009 at 02:33:14PM -0700, Steve Mosher wrote: Cédric Berger wrote: And if it is the buzz fix (by adding the cap) that causes potential problems... what about the SOP currently applied to freerunners ? They may be impacted by incorrect ALSA states ? Yes, that was a concern of mine as well, so this too had to be checked and verified. The complication being that a reworked A6 can only be distinguished AFAIK by visual inspection and not by checking a bit in the hardware. Perhaps you could turn on MICBIAS and measure for how long the current is higher than normal as the capacitor charges. See MICBIAS CURRENT DETECT in the WM8753L manual. -- Rask Ingemann Lambertsen Danish law requires addresses in e-mail to be logged and stored for a year ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
Am Mi 15. April 2009 schrieb Rask Ingemann Lambertsen: On Sat, Apr 04, 2009 at 02:33:14PM -0700, Steve Mosher wrote: Cédric Berger wrote: And if it is the buzz fix (by adding the cap) that causes potential problems... what about the SOP currently applied to freerunners ? They may be impacted by incorrect ALSA states ? Yes, that was a concern of mine as well, so this too had to be checked and verified. The complication being that a reworked A6 can only be distinguished AFAIK by visual inspection and not by checking a bit in the hardware. Perhaps you could turn on MICBIAS and measure for how long the current is higher than normal as the capacitor charges. See MICBIAS CURRENT DETECT in the WM8753L manual. Alas there's no way to read back the results of MICBIAS CURRENT DETECT, so this won't help. There's a way to detect buzzfix by rapidly switching on and off MICBIAS and testing if you hear some buzz when recording from builtin mic. Werner has created a small program to do the switching job. Anyway I'm thinking about tackling this issue from a different more radical vector: implementing a autocalibration scheme for mic sensitivity. This would involve creating a known sound level (e.g. by playback via speaker) and checking (and adjusting) the sensitivity of mic according to the audio level fed back to the mic. Advantage: independent of device hw revision / hw patch level. No need for creation and maintenance of device specific statefiles or other config data. Problem: needs check whether it can be done at all. cheers jOERG signature.asc Description: This is a digitally signed message part. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
Joerg Reisenweber wrote: There's a way to detect buzzfix by rapidly switching on and off MICBIAS and testing if you hear some buzz when recording from builtin mic. Werner has created a small program to do the switching job. I'm actually not sure if this approach works. You can hear the ~40-50 Hz buzz that program (*) generates well enough, but when I added a buzzfix capacitor, that artificial noise was still there. It could be that I did something wrong, though, including not actually applying the buzz fix. (*) http://svn.openmoko.org/developers/werner/wolfhammer/ - Werner ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
Cédric Berger wrote: On Wed, Mar 4, 2009 at 02:09, Steve Mosher st...@openmoko.com wrote: so much for my schedules. There were some issues with ALSA states. so manufacturing got put on hold. then Chinese new year. I'll have an update shortly on A7. So as I understand these were issues not only relating to software ? The issues are as follows: 1. A delay due to the timing of chinese new year. factories shut down. 2. We needed to check that the ALSA states in the production image gave a good experience on the A7. 3. Engineering a smooth transition in the channel between the A6 which is in inventory, and the A7. 4. Coming up with a plan for fixing as much of the buzz issue on existing stock as possible. 5. Working with our distributors to roll the A7 out. Because if it was just a matter of alsa states files not ready yet, production would not have to be put on hold (hey if openmoko would wait for software be ready to start production, no freerunner would be existing yet ;-) ) Sorry, but I got the hammer on this one. I didnt want to launch A7 and require customers to reflash as their first chore. Further, I wanted to go over the test results myself for the phones sent to test before I committed to SMT and assembly. I did that in late feb. And if it is the buzz fix (by adding the cap) that causes potential problems... what about the SOP currently applied to freerunners ? They may be impacted by incorrect ALSA states ? Yes, that was a concern of mine as well, so this too had to be checked and verified. The complication being that a reworked A6 can only be distinguished AFAIK by visual inspection and not by checking a bit in the hardware. Joerg may correct me on this, but I believe the only ALSA state setting that may be effected is the mic sensitivity or gain ( can't recall, exactly ) oh... and still no update about A7 production ? Since I probably have my phone to be replaced (broken button), I am waiting for Bearstech to get new phones (they are out of stock, and anyway since I have to send my phone I want either a A7 or at least the buzz fix applied... not having to send it again later to get it fixed...) When distributors start to take shipments of A7 ( see 1-5 above) we will make an announcement. The buzz fixing program is coming together with Tuxbrain taking a pivotal role in working through the logistics with me. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
Thanks for all these precisions ! Good to have more infos... 2009/4/4 Steve Mosher st...@openmoko.com: [...] When distributors start to take shipments of A7 ( see 1-5 above) we will make an announcement. The buzz fixing program is coming together with Tuxbrain taking a pivotal role in working through the logistics with me. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
your welcomed. I really got behind on my list mail. Now that I'm back down to zero unread mails on the community its easier for me to respond in a timely fashion. Cédric Berger wrote: Thanks for all these precisions ! Good to have more infos... 2009/4/4 Steve Mosher st...@openmoko.com: [...] When distributors start to take shipments of A7 ( see 1-5 above) we will make an announcement. The buzz fixing program is coming together with Tuxbrain taking a pivotal role in working through the logistics with me. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
On Wed, Mar 4, 2009 at 02:09, Steve Mosher st...@openmoko.com wrote: so much for my schedules. There were some issues with ALSA states. so manufacturing got put on hold. then Chinese new year. I'll have an update shortly on A7. So as I understand these were issues not only relating to software ? Because if it was just a matter of alsa states files not ready yet, production would not have to be put on hold (hey if openmoko would wait for software be ready to start production, no freerunner would be existing yet ;-) ) And if it is the buzz fix (by adding the cap) that causes potential problems... what about the SOP currently applied to freerunners ? They may be impacted by incorrect ALSA states ? oh... and still no update about A7 production ? Since I probably have my phone to be replaced (broken button), I am waiting for Bearstech to get new phones (they are out of stock, and anyway since I have to send my phone I want either a A7 or at least the buzz fix applied... not having to send it again later to get it fixed...) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
Xavier Cremaschi a écrit : Hi, one month after, do you have any update relative to shipping date of GTA02v7 ? Kind regards, Xavier mode Biff Tannen ON : Hello? Hello? Anybody home? Huh? :-/ ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
On Tue, Mar 3, 2009 at 01:39, Alexander Raab raab.alexan...@gmx.at wrote: But a few months ago I met someone and he told me that the buzzing is quite heavy. I read about a fix for that on the A7, but there is only a A6 sold. Have I missed something? I do not know what will be fixed on the A7. And Paul Ferster wrote about a modification related to buzz... on the A8 http://n2.nabble.com/Buzz-Issues---Last-Questions%2C-I-promise-tp2509041p2521177.html On Mon, Mar 23, 2009 at 14:51, Paul Fertser fercer...@gmail.com wrote: [...] NB: Factory-produced A8 will have ferrite beads in place (so RF will not get anywhere it can be detected in the first place), and that should probably solve all known buzz problems. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
Cédric Berger cedric.berge...@gmail.com writes: On Tue, Mar 3, 2009 at 01:39, Alexander Raab raab.alexan...@gmx.at wrote: But a few months ago I met someone and he told me that the buzzing is quite heavy. I read about a fix for that on the A7, but there is only a A6 sold. Have I missed something? I do not know what will be fixed on the A7. And Paul Ferster wrote about a modification related to buzz... on the A8 A7 is the same like A6 with factory applied buzz fix. Not fixing headset mic. A8 should fix all known buzz issues. Probably A7 will also probably have an extra cap in the earpiece path that will require to tweak output volume comparing to current settings. -- 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: Bying a Freerunner with the buzz-fix on it
Hi, one month after, do you have any update relative to shipping date of GTA02v7 ? Kind regards, Xavier ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
Alexander Raab a écrit : Hi, I'm thinking about getting a Freerunner. But a few months ago I met someone and he told me that the buzzing is quite heavy. I read about a fix for that on the A7, but there is only a A6 sold. Have I missed something? And whats about the GTA03? Would it be sold this year, next year or ... best regards Alex In a mail from Steve Mosher (VP Marketing) on 2009/02/1st he wrote : -- Feb 2-9: final alsa states for A7 are developed and tested and signed off. Feb 9-16: Phones at the factory are flashed. Feb 16-23: Ship to Disty. Those are not official dates agreed to by everyone working the issue, but I suspect they are close. When will it get to you? That's hard to say. I would expect some disty will try to be the first with A7 phones and will start their order process as the TPE returns for work on 2/2. -- About GTA03 I think almost nobody is working on it, it's just a draft (a wiki page ?), am I wrong ? Xavier. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bying a Freerunner with the buzz-fix on it
so much for my schedules. There were some issues with ALSA states. so manufacturing got put on hold. then Chinese new year. I'll have an update shortly on A7. Xavier Cremaschi wrote: Alexander Raab a écrit : Hi, I'm thinking about getting a Freerunner. But a few months ago I met someone and he told me that the buzzing is quite heavy. I read about a fix for that on the A7, but there is only a A6 sold. Have I missed something? And whats about the GTA03? Would it be sold this year, next year or ... best regards Alex In a mail from Steve Mosher (VP Marketing) on 2009/02/1st he wrote : -- Feb 2-9: final alsa states for A7 are developed and tested and signed off. Feb 9-16: Phones at the factory are flashed. Feb 16-23: Ship to Disty. Those are not official dates agreed to by everyone working the issue, but I suspect they are close. When will it get to you? That's hard to say. I would expect some disty will try to be the first with A7 phones and will start their order process as the TPE returns for work on 2/2. -- About GTA03 I think almost nobody is working on it, it's just a draft (a wiki page ?), am I wrong ? Xavier. ___ 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
