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Filter brewing for the Soekris R2R
Filter brewing for the Soekris R2R
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Old 10th June 2018, 11:19 PM   #1461
PET240 is offline PET240  Australia
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Location: Brisbane Northside
Thank you oneoclock!

I am learning here, so I assume the .zip file has just the filter, not updates to U manager etc?
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Old 1st July 2018, 07:13 PM   #1462
djangoherbert is offline djangoherbert
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Join Date: Jul 2018
Default Kip Hanrahan

Quote:
Originally Posted by spzzzzkt View Post
This is just the last filter with a bunch of quick n dirty Nyquist filters added at the higher sample rates.

I haven't really made any effort to optimise or tweak beyond widening the transition band. With a bit of time and thought I can make up a better batch but for the moment I'll upload the "Just For Jaffar" higher rate filters.

Done a quick test with my limited selection of hi-res:
Kip Hanrahan - Coup de Tete (88.2/24)
Kraftwerk - Minimum Maximum (88.2/24)
Miles Davis - Kind of Blue (192/24)

Sounds fine...
KIP HANRAHAN high res: would it be possible for you to send me Coup de tete (and maybe Desire develops an edge by Kip) via dropbox, wetransfer or any other link, if I pay you? - I live in Austria and wanted to buy the album at hdtracks.com, but due to country restrictions (stupid!!! to release an album and to limit the availability) I couldn't do so...
my mail address is youareveryundude@gmail.com
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Old 8th July 2018, 01:17 PM   #1463
nopants is offline nopants  United States
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Are the ayre-esque MP filters included in the 1541 firmware now?
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Old 15th August 2018, 01:55 PM   #1464
janho12345 is offline janho12345  Germany
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Join Date: Mar 2016
Location: BW /Germany
Hello,

is there something different when downloading filters to dam1121?


I have a filter batch thats working on my dam1021,
I downloaded it to the dam1121, when I list all filters feedback says all my filters are there, and I don't get a complaint when changing filters, but when I ask for current filter, there is only:


debian@beaglebone:~$ sudo python /usr/local/lib/python2.7/dist-packages/dam1021.py -a
INFO:dam1021:
FIR filters:
Bank 01:
FIR1: type(04) C128dp Linear Phase NYQUIST, Interpolation 16 SAMPLES, 44.1Khz
FIR1: type(04) C128dp Linear Phase NYQUIST, Interpolation 16 SAMPLES, 48 Khz
FIR1: type(04) Bypass FIR1. 352.8Khz.
FIR1: type(04) Bypass FIR1, 384 Khz.
FIR2: type(08) C128dp Linear Phase NYQUIST FIR2, Interpolation 16 SAMPLES
FIR2: type(08) C128dp Linear Phase NYQUIST FIR2, Interpolation 16 SAMPLES
Bank 02:
FIR1: type(05) LINEAR INT FIR1, 44.1 Khz Samplerate, Linear Interpolation
FIR1: type(05) LINEAR INT FIR1, 48 Khz Samplerate, Linear Interpolation
FIR1: type(05) LINEAR INT FIR1, 352.8 Khz Samplerate, Bypass
FIR1: type(05) LINEAR INT FIR1, 384 Khz Samplerate, Bypass
FIR2: type(09) LINEAR INT FIR2, 384 Khz Samplerate, Linear Interpolation
FIR2: type(09) LINEAR INT FIR2, 352 Khz Samplerate, Linear Interpolation
Bank 03:
FIR1: type(06) QUASIAPO FIR1, 44.1 Khz Samplerate, 0-19 Khz +- 0.000002 db, 23.35 Khz -170d
FIR1: type(06) QUASIAPO FIR1, 48 Khz Samplerate 0-21 Khz +- 0.01 db, 28 Khz -110db
FIR1: type(06) QUASI APO FIR1, 352.8 Khz Samplerate, Bypass
FIR1: type(06) QUASI APO FIR1, 384 Khz Samplerate, Bypass
FIR2: type(10) QUASIAPO FIR2, 384 Khz Samplerate 0-100 Khz +- 0.01 db, 240 Khz -80db
FIR2: type(10) QUASIAPO FIR2, 352 Khz Samplerate 0-50 Khz +- 0.000002 db, 300 Khz -170 db
Bank 04:
FIR1: type(07) NEWNOS FIR1, 44.1 Khz.
FIR1: type(07) NEWNOS FIR1, 48 Khz.
FIR1: type(07) NEWNOS FIR1, 352.8 Khz Samplerate, Bypass
FIR1: type(07) NEWNOS FIR1, 384 Khz Samplerate, Bypass
FIR2: type(11) NEWNOS FIR2
FIR2: type(11) NEWNOS FIR2
IIR filters:
type(30) Deemphasis IIR, 352.8 Ksps, 50/15 uS
type(30) Deemphasis IIR, 384 Ksps, 50/15 uS
debian@beaglebone:~$ sudo python /usr/local/lib/python2.7/dist-packages/dam1021.py -f 1
INFO:dam1021:Current filter set is 1
debian@beaglebone:~$ sudo python /usr/local/lib/python2.7/dist-packages/dam1021.py -c
INFO:dam1021:
FIR filters:
IIR filters:





I am using Beaglebone black (python library for dam1021) via an isolator to two dam1121s only one TXD (of dam1121) is connected.


I'm stuck here, please help!
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Old 17th August 2018, 08:08 PM   #1465
derekr is offline derekr  Barbados
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Don't think the 1021 filter pack is compatible with the 1121. And, to the best of my knowledge, there's no available file with current 1121 filters.

What persuaded you to use a file clearly labelled 1021 with the 1121??

Your best bet would be to contact Søren and ask a question.....(and hope the weather in Denmark has changed for the worst!!!)

Last edited by derekr; 17th August 2018 at 08:12 PM.
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Old 17th August 2018, 08:16 PM   #1466
janho12345 is offline janho12345  Germany
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Join Date: Mar 2016
Location: BW /Germany
Quote:
Originally Posted by derekr View Post
Don't think the 1021 filter pack is compatible with the 1121. And, to the best of my knowledge, there's no available file with current 1121 filters.

What persuaded you to use a file clearly labelled 1021 with the 1121??

Your best bet would be to contact Søren and ask a question.....(and hope the weather in Denmark has changed for the worst!!!)





Here's an abstract from 1121 manual:


"All filters are using 32 bit coefficients, with up to 67 bit MAC accumulator. The filter file format is the same as used in the dam1021, the files are available at http://www.soekris.dk"
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Old 17th August 2018, 09:24 PM   #1467
derekr is offline derekr  Barbados
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File format may be the same but I believe I read somewhere that there are differences in how the FPGA on the two boards handles things necessitating different firmware.

Did you upload just the filters or the full (including the uC firmware) file?
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Old 17th August 2018, 09:26 PM   #1468
janho12345 is offline janho12345  Germany
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Location: BW /Germany
Just the filters.
May it be because I don’t have a valid signal that it’s locking to?
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Old 17th August 2018, 09:51 PM   #1469
derekr is offline derekr  Barbados
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Join Date: Mar 2009
Suspect its a firmware mismatch. You need to contact Søren - either PM or in the 1121 thread - he may be able to send you or post on soekris.dk the current full file for the 1121. Or better yet, the new filters and updated 1121 firmware the good weather in Denmark is holding up...
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Old 17th August 2018, 11:09 PM   #1470
soekris is offline soekris  Denmark
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Join Date: Jun 2009
Filter brewing for the Soekris R2R
dam1021 and dam1121 use the exact same filter file. I have no idea what janho12345 is doing and the filter file is not even the soekris one....

Both the mkrom utility and the boards firmware only do some basic checks, if you're not careful you can easily screw something up....
__________________
Søren

Last edited by soekris; 17th August 2018 at 11:15 PM.
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