Best Digital Filter Chips and Info?

fastcat95 · 20th March 2005, 06:57 PM

Hello to All:

I want to ask (take a mini poll) as to what people think
are the best digital filter chips that have been on the
market in terms of sound quality. They could be either
current or past production.

Also, does anyone know of web sites that discuss things
like digital filter impulse response and associated issues?

Thanks to all in advance!

fastcat

jean-paul · 20th March 2005, 08:12 PM

SM5842 and SM5843 are OK when you want the OS route. Funny but I recently read this about it :

http://www.dagogo.com/47LabFlatfishP...ommentary.html

JohnW · 20th March 2005, 10:26 PM

Fastcat,

No Question, the Pacific Microsonics PMD100 / PMD 200 HDCD filters - IMO nothing comes even close... other filters give digital filters a bad name.

Besides these - next best would be the YSF210 Yamaha 22bit.

The NPC filters (as badged by Burr Brown / TI) always seem to lean on the side of being bass-heavy & poor sound staging compared to the neutral sounding Yamaha’s and HDCD filters.

John

leadbelly · 20th March 2005, 11:10 PM

Quote:

Originally posted by JohnW
No Question, the Pacific Microsonics PMD100 / PMD 200 HDCD filters - IMO nothing comes even close... other filters give digital filters a bad name.

Would there be some means by which mere DIY mortals might acquire these?

fastcat95 · 20th March 2005, 11:10 PM

JohnW:

A bit amazing that the PMD100 & 200 are still the
best sounding digital filter chips. I would have
thought that some manufacturer ( TI, AD, NPC,
etc.) might have come up with something better
at handling the digital filtering. I guess that Keith
Johnson & company (Pacific Microsonics) were
just that much better (or ahead) of the crowd.

Fastcat

Extreme_Boky · 21st March 2005, 12:51 AM

'Vintage' YM3623B was good chip as well...

Nick

jean-paul · 21st March 2005, 05:53 AM

YM3623B is a digital receiver ( DIR ) like Crystal CS8412 etc.

BTW the PMD100 is nothing but neutral IMO on non-HDCD recordings which made me choose other filters at that time. Fastcat, if you include combined digital filter+DAC chips there are other candidates as well.

kiwi_abroad · 21st March 2005, 08:41 AM

In a lot of cases, modern DAC's have built in digital filters eg AD1955 and PCM1792, and many others. Some allow the internal digial filter to be bypassed, so you have to hook up an external one. The question is, how do the internal filters compare to the external ones. One would hope the the internal filters are customized / optimized for the DAC they are part of.

Adrian

percy · 6th February 2009, 09:02 PM

I know I am reviving a very old thread but I was searching about the same subject so I thought I'd just bump this up.

The SM5842/7 and PMD100/200 seem to be the only decent digital filters that have ever been around. Arn't there really no new digital filters that are as good, if not better, than these filters ?
Digital filters have always appealed to me over 'Sample Rate Conversion' for oversampling 44.1Khz because of the integer oversampling ratio and also a higher ratio(8x) than typical ASRC(192khz).

Are there any modern DSP processors or solutions that could be substituted for these filters ?

I am also not opposed to the idea of doing a pic based diy filter.

Bernhard · 6th February 2009, 09:13 PM

I strongly believe that this one is the best digital filter currently available:

20th March 2005, 06:57 PM	#1
fastcat95 diyAudio Member Join Date: Jul 2003 Location: Indiana	Best Digital Filter Chips and Info? Hello to All: I want to ask (take a mini poll) as to what people think are the best digital filter chips that have been on the market in terms of sound quality. They could be either current or past production. Also, does anyone know of web sites that discuss things like digital filter impulse response and associated issues? Thanks to all in advance! fastcat

20th March 2005, 08:12 PM	#2
jean-paul diyAudio Moderator Emeritus Join Date: Sep 2002 Location: Germany	SM5842 and SM5843 are OK when you want the OS route. Funny but I recently read this about it : http://www.dagogo.com/47LabFlatfishP...ommentary.html __________________ It's only audio

20th March 2005, 10:26 PM	#3
JohnW diyAudio Member Join Date: Jan 2004 Location: Discovery Bay, Prague, Paris...	Fastcat, No Question, the Pacific Microsonics PMD100 / PMD 200 HDCD filters - IMO nothing comes even close... other filters give digital filters a bad name. Besides these - next best would be the YSF210 Yamaha 22bit. The NPC filters (as badged by Burr Brown / TI) always seem to lean on the side of being bass-heavy & poor sound staging compared to the neutral sounding Yamaha’s and HDCD filters. John __________________ Life shouldn’t be take it too seriously, you will not come out alive anyway…

21st March 2005, 05:53 AM	#7
jean-paul diyAudio Moderator Emeritus Join Date: Sep 2002 Location: Germany	YM3623B is a digital receiver ( DIR ) like Crystal CS8412 etc. BTW the PMD100 is nothing but neutral IMO on non-HDCD recordings which made me choose other filters at that time. Fastcat, if you include combined digital filter+DAC chips there are other candidates as well. __________________ It's only audio

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20th March 2005, 11:10 PM	#5
fastcat95 diyAudio Member Join Date: Jul 2003 Location: Indiana	JohnW: A bit amazing that the PMD100 & 200 are still the best sounding digital filter chips. I would have thought that some manufacturer ( TI, AD, NPC, etc.) might have come up with something better at handling the digital filtering. I guess that Keith Johnson & company (Pacific Microsonics) were just that much better (or ahead) of the crowd. Fastcat

21st March 2005, 12:51 AM	#6
Extreme_Boky diyAudio Member Join Date: Dec 2003 Location: Sydney	'Vintage' YM3623B was good chip as well... Nick

21st March 2005, 08:41 AM	#8
kiwi_abroad diyAudio Member Join Date: Sep 2001 Location: Wellington, New Zealand	In a lot of cases, modern DAC's have built in digital filters eg AD1955 and PCM1792, and many others. Some allow the internal digial filter to be bypassed, so you have to hook up an external one. The question is, how do the internal filters compare to the external ones. One would hope the the internal filters are customized / optimized for the DAC they are part of. Adrian

6th February 2009, 09:02 PM	#9
percy diyAudio Member Join Date: Apr 2004 Location: MN	I know I am reviving a very old thread but I was searching about the same subject so I thought I'd just bump this up. The SM5842/7 and PMD100/200 seem to be the only decent digital filters that have ever been around. Arn't there really no new digital filters that are as good, if not better, than these filters ? Digital filters have always appealed to me over 'Sample Rate Conversion' for oversampling 44.1Khz because of the integer oversampling ratio and also a higher ratio(8x) than typical ASRC(192khz). Are there any modern DSP processors or solutions that could be substituted for these filters ? I am also not opposed to the idea of doing a pic based diy filter.

6th February 2009, 09:13 PM	#10
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	I strongly believe that this one is the best digital filter currently available:

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