[Csnd] Howto: Chebyshev I Type bandpass filter
| Date | 2018-03-12 18:44 |
| From | Anton Kholomiov |
| Subject | [Csnd] Howto: Chebyshev I Type bandpass filter |
How to create this kind of filter in Csound? (Chebyshev I Type bandpass filter) But I need a bandpass |
| Date | 2018-03-12 18:47 |
| From | Justin Rosander |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
Hi Anton, I use butterbp. --Justin
Sent from Mail for Windows 10
From: Anton Kholomiov
How to create this kind of filter in Csound? (Chebyshev I Type bandpass filter)
The closest thing that I've found is clfilt
It can do Chebyshev I Type low and high pass. But I need a bandpass
Is it right to create the band pass with superposition of high-pass followed by low-pass with the same specs: dB ripple? Or do you know a better method to create this filter? Cheers, Anton Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
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| Date | 2018-03-12 18:51 |
| From | Anton Kholomiov |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
Thanks for feedback Justin! But I need it for reimplementation of specific algorithm, so in my case I need to replicate exact type of filter Chebyshev I2018-03-12 21:47 GMT+03:00 Justin Rosander <justinrosander@gmail.com>:
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| Date | 2018-03-12 18:53 |
| From | Anton Kholomiov |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
The algorith, is writtern in MATLAB and it uses the function `cheby1` to get the coefficients for the filterand then feeds it to Biquad filter. Actually we have the biquad filter implementaition but I'm not literate enough to calculate the coefficients in raw Csound. 2018-03-12 21:51 GMT+03:00 Anton Kholomiov <anton.kholomiov@gmail.com>:
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| Date | 2018-03-12 19:02 |
| From | Victor Lazzarini |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
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http://csound.com/docs/manual-fr/clfilt.html Victor Lazzarini
Dean of Arts, Celtic Studies, and Philosophy
Maynooth University
Ireland
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| Date | 2018-03-12 19:03 |
| From | mskala@ANSUZ.SOOKE.BC.CA |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
On Mon, 12 Mar 2018, Anton Kholomiov wrote:
> But I need it for reimplementation of specific algorithm, so
> in my case I need to replicate exact type of filter Chebyshev I
If you know the exact transfer function of the filter you want, you could
factor it and produce the same transfer function using an appropriate
number of biquad opcodes.
--
Matthew Skala
mskala@ansuz.sooke.bc.ca People before principles.
http://ansuz.sooke.bc.ca/
Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here |
| Date | 2018-03-12 19:04 |
| From | Victor Lazzarini |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
|
or in Eng
http://csound.com/docs/manual/clfilt.html
Victor Lazzarini
Dean of Arts, Celtic Studies, and Philosophy
Maynooth University
Ireland
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| Date | 2018-03-12 19:06 |
| From | Anton Kholomiov |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
@Victor Yes this is right for Low and High pass, but Is it right to use a combo of them to create bandpass type? @Matthew I can not use exact coefficients since they depend on k-rate input params of the algorithm 2018-03-12 22:04 GMT+03:00 Victor Lazzarini <Victor.Lazzarini@mu.ie>:
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| Date | 2018-03-12 19:22 |
| From | mskala@ANSUZ.SOOKE.BC.CA |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
On Mon, 12 Mar 2018, Anton Kholomiov wrote:
> @Matthew I can not use exact coefficients since they depend on k-rate input
> params of the algorithm
In principle you could calculate them (the biquad opcode takes k-rate
coefficients) but I recognize that that may be too complicated.
--
Matthew Skala
mskala@ansuz.sooke.bc.ca People before principles.
http://ansuz.sooke.bc.ca/
Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here |
| Date | 2018-03-12 19:54 |
| From | Victor Lazzarini |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
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Use a LP and an HP in series. That would make a BP. Overlap the passband of one with the stopband of the other. Victor Lazzarini
Dean of Arts, Celtic Studies, and Philosophy
Maynooth University
Ireland
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| Date | 2018-03-12 19:59 |
| From | Anton Kholomiov |
| Subject | Re: [Csnd] Howto: Chebyshev I Type bandpass filter |
Cool! Thanks for the advices! 2018-03-12 22:54 GMT+03:00 Victor Lazzarini <Victor.Lazzarini@mu.ie>:
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