Dear PD-Users, I'm having a problem with a patch that filters overtones from a sample. I use for that a bp filter. The center values for frecuency, Q and output volume are changed according to which overtone one wishes to hear. It is so configured, that one can select between overtones 3 to 17, pressing keys d, r, f, t, g, y, h, u, j, i, k, o, l, p and ñ (I have a spanish keyboard). The problem is when I want to change between overtones: one hears a noise. I solved that partially by reducing the output volume of the bp filter to 0, than changing the filter parameters values and then raising up the volume again to 1. That works only with adjacent overtones (for ex. overtone 3 to 4 or 3 to 5), but with larger jumps (for ex. 3 to 15), the noise comes again, the larger the jump, the stronger the noise.
I send attached the patch and a sample (Fagot). You need to open the sample ("open file" bang), select the third Vradio-square (Fagot, that sends specific Q and volume values for filtering this sample), then start the sample (key "a", it loops itself), then overtone selection (keys d, r, f, t...). The filter is in the suubpatch "Overtone_Filter". If you try for example changing from overtone 3 ("d") to 12 ("i") you'll hear a strong noise... I hope you can help me! I'll use this for a research on overtones effects on human health. Greetings!Daniel Salva
Daniel, can you try the [vcf~] object instead of [bp~]? The noise you hear most likely happens when you change the filter frequency non-continuously.
- Daniel Martin via Pd-list pd-list@lists.iem.at [2023-02-17 20:15]:
Dear PD-Users,                        I'm having a problem with a patch that filters overtones from a sample. I use for that a bp filter. The center values for frecuency, Q and output volume are changed according to which overtone one wishes to hear. It is so configured, that one can select between overtones 3 to 17, pressing keys d, r, f, t, g, y, h, u, j, i, k, o, l, p and ñ (I have a spanish keyboard). The problem is when I want to change between overtones: one hears a noise. I solved that partially by reducing the output volume of the bp filter to 0, than changing the filter parameters values and then raising up the volume again to 1. That works only with adjacent overtones (for ex. overtone 3 to 4 or 3 to 5), but with larger jumps (for ex. 3 to 15), the noise comes again, the larger the jump, the stronger the noise.
          I send attached the patch and a sample (Fagot). You need to open the sample ("open file" bang), select the third Vradio-square (Fagot, that sends specific Q and volume values for filtering this sample), then start the sample (key "a", it loops itself), then overtone selection (keys d, r, f, t...). The filter is in the suubpatch "Overtone_Filter". If you try for example changing from overtone 3 ("d") to 12 ("i") you'll hear a strong noise...  I hope you can help me! I'll use this for a research on overtones effects on human health. Greetings!Daniel Salva
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Hello Peter, thanks for the help. Unfortunately it doesn't work with the [vcf~] object either. As you say, the problem is that I jump from a frequency to the next non-continuosly. Is there a way to do that without interrupting the signal and without noise? Daniel
El viernes, 17 de febrero de 2023, 23:52:22 GMT+1, Peter P. <peterparker@fastmail.com> escribió:
Daniel, can you try the [vcf~] object instead of [bp~]? The noise you hear most likely happens when you change the filter frequency non-continuously.
- Daniel Martin via Pd-list pd-list@lists.iem.at [2023-02-17 20:15]:
Dear PD-Users, I'm having a problem with a patch that filters overtones from a sample. I use for that a bp filter. The center values for frecuency, Q and output volume are changed according to which overtone one wishes to hear. It is so configured, that one can select between overtones 3 to 17, pressing keys d, r, f, t, g, y, h, u, j, i, k, o, l, p and ñ (I have a spanish keyboard). The problem is when I want to change between overtones: one hears a noise. I solved that partially by reducing the output volume of the bp filter to 0, than changing the filter parameters values and then raising up the volume again to 1. That works only with adjacent overtones (for ex. overtone 3 to 4 or 3 to 5), but with larger jumps (for ex. 3 to 15), the noise comes again, the larger the jump, the stronger the noise.
I send attached the patch and a sample (Fagot). You need to open the sample ("open file" bang), select the third Vradio-square (Fagot, that sends specific Q and volume values for filtering this sample), then start the sample (key "a", it loops itself), then overtone selection (keys d, r, f, t...). The filter is in the suubpatch "Overtone_Filter". If you try for example changing from overtone 3 ("d") to 12 ("i") you'll hear a strong noise... I hope you can help me! I'll use this for a research on overtones effects on human health. Greetings!Daniel Salva
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Hi Daniel,
Did you smooth the frequency changes with a [line~] object or something else before sending to [vcf~]'s 2nd inlet? You can do the same to make gradual transitions for Q changes, but since the Q inlet doesn't take a signal you'll have to use [line] instead.
On Sat, Feb 18, 2023 at 8:19 AM Daniel Martin via Pd-list < pd-list@lists.iem.at> wrote:
Hello Peter, thanks for the help. Unfortunately it doesn't work with the [vcf~] object either. As you say, the problem is that I jump from a frequency to the next non-continuosly. Is there a way to do that without interrupting the signal and without noise?
Daniel
El viernes, 17 de febrero de 2023, 23:52:22 GMT+1, Peter P. < peterparker@fastmail.com> escribió:
Daniel, can you try the [vcf~] object instead of [bp~]? The noise you hear most likely happens when you change the filter frequency non-continuously.
- Daniel Martin via Pd-list pd-list@lists.iem.at [2023-02-17 20:15]:
Dear PD-Users, I'm having a problem with a patch
that filters overtones from a sample. I use for that a bp filter. The center values for frecuency, Q and output volume are changed according to which overtone one wishes to hear. It is so configured, that one can select between overtones 3 to 17, pressing keys d, r, f, t, g, y, h, u, j, i, k, o, l, p and ñ (I have a spanish keyboard). The problem is when I want to change between overtones: one hears a noise. I solved that partially by reducing the output volume of the bp filter to 0, than changing the filter parameters values and then raising up the volume again to 1. That works only with adjacent overtones (for ex. overtone 3 to 4 or 3 to 5), but with larger jumps (for ex. 3 to 15), the noise comes again, the larger the jump, the stronger the noise.
I send attached the patch and a sample (Fagot). You need toopen the sample ("open file" bang), select the third Vradio-square (Fagot, that sends specific Q and volume values for filtering this sample), then start the sample (key "a", it loops itself), then overtone selection (keys d, r, f, t...). The filter is in the suubpatch "Overtone_Filter". If you try for example changing from overtone 3 ("d") to 12 ("i") you'll hear a strong noise...
I hope you can help me! I'll use this for a research on overtones
effects on human health.
Greetings!Daniel Salva
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https://lists.puredata.info/listinfo/pd-list
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Hi,
I would do it by having multiple filters in parallel, one for each overtone, and mix between their outputs, instead of changing a single filter's parameters (which is problematic).
This would use more CPU power, but [bp~] is pretty cheap.
It would also make possible mixing overtones in different proportions, which may or may not be useful.
Claude
On 18/02/2023 18:42, William Brent wrote:
Did you smooth the frequency changes with a [line~] object or something else before sending to [vcf~]'s 2nd inlet? You can do the same to make gradual transitions for Q changes, but since the Q inlet doesn't take a signal you'll have to use [line] instead.
On Sat, Feb 18, 2023 at 8:19 AM Daniel Martin via Pd-list pd-list@lists.iem.at wrote:
As you say, the problem is that I jump from a frequency to the next non-continuosly. Is there a way to do that without interrupting the signal and without noise? El viernes, 17 de febrero de 2023, 23:52:22 GMT+1, Peter P. <peterparker@fastmail.com> escribió: Daniel, can you try the [vcf~] object instead of [bp~]? The noise you hear most likely happens when you change the filter frequency non-continuously. * Daniel Martin via Pd-list <pd-list@lists.iem.at> [2023-02-17 20:15]: > Dear PD-Users, I'm having a problem with a patch that filters overtones from a sample. I use for that a bp filter. The center values for frecuency, Q and output volume are changed according to which overtone one wishes to hear. It is so configured, that one can select between overtones 3 to 17, pressing keys d, r, f, t, g, y, h, u, j, i, k, o, l, p and ñ (I have a spanish keyboard). The problem is when I want to change between overtones: one hears a noise. I solved that partially by reducing the output volume of the bp filter to 0, than changing the filter parameters values and then raising up the volume again to 1. That works only with adjacent overtones (for ex. overtone 3 to 4 or 3 to 5), but with larger jumps (for ex. 3 to 15), the noise comes again, the larger the jump, the stronger the noise.
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Claude Heiland-Allen -
Daniel Martin -
Peter P. -
William Brent