Hi Tom and all, Am 23.08.2015 um 18:36 schrieb Tom Wiltshire: > Has anyone else tried anything like this? Are there other musical circuits using the 4046 as a high frequency VCO? Any other thoughts or comments? Similar idea: http://schmitzbits.de/ddl.html Best, René -- synth at schmitzbits.de http://www.schmitzbits.de/