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Audio DSP PCI Card

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Audio DSP PCI Card by Unknown on Apr 28, 2004			Not available!
Hi, this project seems passionating! I am specially interested in the fact of using a fpga to process filtering applications. I'm looking for opensources projects with such application. However, i think spartan3 is MUCH more dedicated to audio processing than spartan2 familiy. Although those chips are not yet fully available , there should have no problem to buy some in a couple of weeks. I would be interested in participating in filter part of your project. How do you proceed? Do you have a lot of people involved? See you very soon, Cedric Bernard, Electronic Engineer Hi, this project seems passionating! I am specially interested in the fact of using a fpga to process filtering applications. I'm looking for opensources projects with such application. However, i think spartan3 is MUCH more dedicated to audio processing than spartan2 familiy. Although those chips are not yet fully available , there should have no problem to buy some in a couple of weeks. I would be interested in participating in filter part of your project. How do you proceed? Do you have a lot of people involved? See you very soon, Cedric Bernard, Electronic Engineer

Audio DSP PCI Card by Unknown on May 3, 2004			Not available!
Hello Cedric, <A HREF="http://www.opencores.org/mailman/listinfo/cores">n7wavelets at yahoo.fr</A> wrote: [q]Hi, this project seems passionating! [/q] :) [q]I am specially interested in the fact of using a fpga to process filtering applications. [/q] Ok. [q]I'm looking for opensources projects with such application. However, i think spartan3 is MUCH more dedicated to audio processing than spartan2 familiy. [/q] Probably yes, but note that number of high quality audio ADC and DAC chips still have 5V digital interface, this is a reason for my suggestion. (Spartan2) Only new generation chips have claimed 3.3V digital I/O possibility, or low cost codec sollutions. AK5394A (e.g) ADC from AKM have 3.3V I/O, but AK4395 DAC don't (this two is the best, hard to buy, chips from AKM) Cirrus and TI have probably better sollutions but 3.3V or 5V I/O capability is mixed also. [q]Although those chips are not yet fully available , there should have no problem to buy some in a couple of weeks. [/q] Actually Spartan2 chips is a bit expensive than Spartan2e (e.g) ... but 5V I/O protection is is a bit expensive also. With Spartan2 we don't have such problems. [q]I would be interested in participating in filter part of your project. [/q] Ok. [q]How do you proceed? Do you have a lot of people involved? [/q] We will see. Best regards, Bogic Petrovic [q]See you very soon, Cedric Bernard, Electronic Engineer _______________________________________________ <A HREF="http://www.opencores.org/mailman/listinfo/cores">http://www.opencores.org/mailman/listinfo/cores</A> [/q] Hello Cedric, n7wavelets at yahoo.fr wrote: Hi, this project seems passionating! :) I am specially interested in the fact of using a fpga to process filtering applications. Ok. I'm looking for opensources projects with such application. However, i think spartan3 is MUCH more dedicated to audio processing than spartan2 familiy. Probably yes, but note that number of high quality audio ADC and DAC chips still have 5V digital interface, this is a reason for my suggestion. (Spartan2) Only new generation chips have claimed 3.3V digital I/O possibility, or low cost codec sollutions. AK5394A (e.g) ADC from AKM have 3.3V I/O, but AK4395 DAC don't (this two is the best, hard to buy, chips from AKM) Cirrus and TI have probably better sollutions but 3.3V or 5V I/O capability is mixed also. Although those chips are not yet fully available , there should have no problem to buy some in a couple of weeks. Actually Spartan2 chips is a bit expensive than Spartan2e (e.g) ... but 5V I/O protection is is a bit expensive also. With Spartan2 we don't have such problems. I would be interested in participating in filter part of your project. Ok. How do you proceed? Do you have a lot of people involved? We will see. Best regards, Bogic Petrovic See you very soon, Cedric Bernard, Electronic Engineer _______________________________________________ http://www.opencores.org/mailman/listinfo/cores

Audio DSP PCI Card by Unknown on Jun 1, 2004			Not available!
Hello What kind of clock (freq, stability) will drive FPGA - from PCI or independent source? If we want use DLL in Spartan we should have f >= 24MHz. Maybe it's obvious but good to know. Regards Jerzy Gbur Hello What kind of clock (freq, stability) will drive FPGA - from PCI or independent source? If we want use DLL in Spartan we should have f >= 24MHz. Maybe it's obvious but good to know. Regards Jerzy Gbur

Audio DSP PCI Card by Unknown on Jun 1, 2004			Not available!
Hello! <A HREF="http://www.opencores.org/mailman/listinfo/cores">furia1024 at wp.pl</A> wrote: [q]Hello What kind of clock (freq, stability) will drive FPGA - from PCI or independent source? [/q] From both... at least... there were external clock possibility also, We plan to implement some (TC)VCXO at digital PLL place.... this will be most better sollution... with poslibility to omit this componnents in cheaper versions... [q] If we want use DLL in Spartan we should have f >= 24MHz. Maybe it's obvious but good to know. [/q] Yes, this is a good information., as i remember there are 24288kHz for Nx48kHz sample rates... that will be enough... what do you think? Best regards, -boggy [q] [/q] Hello! furia1024 at wp.pl wrote: Hello What kind of clock (freq, stability) will drive FPGA - from PCI or independent source? From both... at least... there were external clock possibility also, We plan to implement some (TC)VCXO at digital PLL place.... this will be most better sollution... with poslibility to omit this componnents in cheaper versions... If we want use DLL in Spartan we should have f >= 24MHz. Maybe it's obvious but good to know. Yes, this is a good information., as i remember there are 24288kHz for Nx48kHz sample rates... that will be enough... what do you think? Best regards, -boggy

Audio DSP PCI Card by Unknown on Jun 1, 2004			Not available!
[q]>If we want use DLL in Spartan we should have f >= 24MHz. >Maybe it's obvious but good to know. > >[/q] Yes, this is a good information., as i remember there are [/q] 24288kHz for [q] Nx48kHz sample rates... that will be enough... what do you think?[/q] Should be enough, as Xilinx's papers says. :) Besides, in design mechanics - prints and shields should be good placed - in computer box there are many signlas which makes distortions. That our 100dB on ADC and DAC will be full used. But I'm not PCB designer and I can't help in it. Regards Jerzy Gbur -- "Everything is simple until it'll be comprehensible" - furia ---------------------------------------------------- WÅ‚adca pierÅ›cieni za 10 zÅ‚! <A HREF="http://klik.wp.pl/?adr=http%3A%2F%2Fwww.zapisz-sie.ksk.pl%2Fwp&sid=187">http://klik.wp.pl/?adr=http%3A%2F%2Fwww.zapisz-sie.ksk.pl%2Fwp&sid=187</A> >If we want use DLL in Spartan we should have f >= 24MHz. >Maybe it's obvious but good to know. > > Yes, this is a good information., as i remember there are 24288kHz for Nx48kHz sample rates... that will be enough... what do you think? Should be enough, as Xilinx's papers says. :) Besides, in design mechanics - prints and shields should be good placed - in computer box there are many signlas which makes distortions. That our 100dB on ADC and DAC will be full used. But I'm not PCB designer and I can't help in it. Regards Jerzy Gbur -- "Everything is simple until it'll be comprehensible" - furia ---------------------------------------------------- WÅ‚adca pierÅ›cieni za 10 zÅ‚! http://klik.wp.pl/?adr=http%3A%2F%2Fwww.zapisz-sie.ksk.pl%2Fwp&sid=187

Audio DSP PCI Card by Unknown on Jun 1, 2004			Not available!
Jerzy G wrote: [q]If we want use DLL in Spartan we should have f >= 24MHz. Maybe it's obvious but good to know. [/q] Yes, this is a good information., as i remember there are [/q] 24288kHz for [q]Nx48kHz sample rates... that will be enough... what do you think? [/q] Should be enough, as Xilinx's papers says. :) [/q] Ah, ok. [q]Besides, in design mechanics - prints and shields should be good placed - in computer box there are many signlas which makes distortions. That our 100dB on ADC and DAC will be full used. [/q] huuu, I know this... our passive components will probably cost about 1/3 overall price. But this will be quiet design, and relatively insensible to other noise sources... but, we will see... [q]But I'm not PCB designer and I can't help in it. [/q] I will do PCB design, no problem. I have some experience. Best regards, -boggy [q]Regards Jerzy Gbur -- "Everything is simple until it'll be comprehensible" - furia ---------------------------------------------------- WÅ‚adca pierÅ›cieni za 10 zÅ‚! <A HREF="http://klik.wp.pl/?adr=http%3A%2F%2Fwww.zapisz-sie.ksk.pl%2Fwp&sid=187">http://klik.wp.pl/?adr=http%3A%2F%2Fwww.zapisz-sie.ksk.pl%2Fwp&sid=187</A> _______________________________________________ <A HREF="http://www.opencores.org/mailman/listinfo/cores">http://www.opencores.org/mailman/listinfo/cores</A> [/q] Jerzy G wrote: If we want use DLL in Spartan we should have f >= 24MHz. Maybe it's obvious but good to know. Yes, this is a good information., as i remember there are 24288kHz for Nx48kHz sample rates... that will be enough... what do you think? Should be enough, as Xilinx's papers says. :) Ah, ok. Besides, in design mechanics - prints and shields should be good placed - in computer box there are many signlas which makes distortions. That our 100dB on ADC and DAC will be full used. huuu, I know this... our passive components will probably cost about 1/3 overall price. But this will be quiet design, and relatively insensible to other noise sources... but, we will see... But I'm not PCB designer and I can't help in it. I will do PCB design, no problem. I have some experience. Best regards, -boggy Regards Jerzy Gbur -- "Everything is simple until it'll be comprehensible" - furia ---------------------------------------------------- WÅ‚adca pierÅ›cieni za 10 zÅ‚! http://klik.wp.pl/?adr=http%3A%2F%2Fwww.zapisz-sie.ksk.pl%2Fwp&sid=187 _______________________________________________ http://www.opencores.org/mailman/listinfo/cores

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