Timeline for VCO for synth V/Octave and battery supply?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| May 21, 2013 at 21:32 | comment | added | Andy aka | @JackDamery If you click on my profile it'll take you to my music website or, just google James Oakwood. Semi-conventional pop, rock, jazz and blues is my stuff. I play it all but I did build synth stuff way back in the 70s!! | |
| May 21, 2013 at 20:21 | comment | added | blarg | Thanks, the only filter is the quiet bit at the end where I ran it through a Monotron. Yes, that's me. Do you build synths too? | |
| May 21, 2013 at 20:07 | comment | added | Andy aka | Nice in-yer-face sound jack - are you dot music then? | |
| May 21, 2013 at 18:54 | comment | added | blarg | Thanks andy, it only tracks over about 3 octaves albeit VERY analogue. Here's a sound clip soundcloud.com/dot I used the expo convertor illustrated in the bottom left window of this schematic, but i had to sub the transistors. electro-music.com/forum/phpbb-files/40106vco_954.png | |
| May 21, 2013 at 16:33 | comment | added | Andy aka | @JackDamery that is so cool Jack - which exponential convertor did you use? | |
| May 21, 2013 at 15:11 | comment | added | blarg | I've since got it working on +/- 12v and built a 1v per octave exponential convertor for control. Control is provided by MIDI to CV using an Arduino with DAC IC. | |
| Apr 8, 2013 at 13:37 | vote | accept | blarg | ||
| Apr 8, 2013 at 13:37 | |||||
| Mar 26, 2013 at 23:00 | history | bounty ended | blarg | ||
| Mar 22, 2013 at 9:04 | comment | added | Andy aka | This is a linear Hz per volt circuit and is not suitable for a music synthesizer. It needs to be Octave per volt i.e. the frequency doubles for every volt increase on the VCO input or put another way each semitone increase is brought about by an identical increase in input voltage - at 100Hz, a semitone higher is 105.9Hz, the next semitone higher is 112.2Hz - the new step being 6.3Hz as opposed to 5.9Hz for the first step. | |
| Mar 22, 2013 at 8:50 | comment | added | blarg | Here's a circuit I've tried unsuccesfully on +/-9v using two pp3 batteries. I'd very much like to adapt it to 9v electro-music.com/forum/topic-41483.html | |
| Mar 20, 2013 at 13:42 | history | edited | Andy aka | CC BY-SA 3.0 |
typo type typo
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| Mar 19, 2013 at 18:22 | history | edited | Andy aka | CC BY-SA 3.0 |
typo
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| Mar 19, 2013 at 15:42 | history | answered | Andy aka | CC BY-SA 3.0 |
