Martin's famous 10 Octaves, 40 bands splitter question.
Posted: Thu Jun 18, 2020 5:50 pm
Martin,
You did amazing work on this and I noticed it was used in several ways through the forum. I have went through this design many times and some things with my "humble" ignorance don't add up when I try to expand the bands or narrow them down to certain ranges. I attached a the schematic 3.0.6 of what I am trying to describe and my goals.
1. 40 bands across the entire freq range: How would I narrow the freq for this and make it specific ones and or expand it to more bands with the exact freq. I did mess with the BW values as well with mixed results.
The smallest unit I thought was 1.059 which is being used for the semitones (minor second) in the Octave Cascade. I assume I would not change this?
2. I tried the changing 8371.94 labeled as "C5@ hop 16". The hop part is really vague, I only found a couple of things on this, however, I noticed different results when I changed this number. When I put a sine wave at different freq, I get mixed results that appears to be duplicating in different areas.
I see plenty of radio related hop - https://en.wikipedia.org/wiki/Frequency ... d_spectrum
How does this relate to this use?
3. Freq values: 2^n to get .8192, .4096, .2048 etc. seem to make the most sense and I have the most positive response. However, it I still can't narrow down all 40 bands to exactly what I want with predictable results.
As I stated above I tried to expand and I would like to get 88 band freq like a piano has.
I assume this framework can be achieved by playing with the numbers and not changing the actual framework correct?
Thanks for all help,
Patrick
You did amazing work on this and I noticed it was used in several ways through the forum. I have went through this design many times and some things with my "humble" ignorance don't add up when I try to expand the bands or narrow them down to certain ranges. I attached a the schematic 3.0.6 of what I am trying to describe and my goals.
1. 40 bands across the entire freq range: How would I narrow the freq for this and make it specific ones and or expand it to more bands with the exact freq. I did mess with the BW values as well with mixed results.
The smallest unit I thought was 1.059 which is being used for the semitones (minor second) in the Octave Cascade. I assume I would not change this?
2. I tried the changing 8371.94 labeled as "C5@ hop 16". The hop part is really vague, I only found a couple of things on this, however, I noticed different results when I changed this number. When I put a sine wave at different freq, I get mixed results that appears to be duplicating in different areas.
I see plenty of radio related hop - https://en.wikipedia.org/wiki/Frequency ... d_spectrum
How does this relate to this use?
3. Freq values: 2^n to get .8192, .4096, .2048 etc. seem to make the most sense and I have the most positive response. However, it I still can't narrow down all 40 bands to exactly what I want with predictable results.
As I stated above I tried to expand and I would like to get 88 band freq like a piano has.
I assume this framework can be achieved by playing with the numbers and not changing the actual framework correct?
Thanks for all help,
Patrick