The first steps towards the realisation of a real B&K vocoder are made. Just before the Christmas holidays I finished the design of the AMD printed circuit board. This is an Amplitude Demodulator that will be an important part of the setup of the Vocoder.
A more detailed description of the circuit can be found here.
The power-supply is one of the most important parts of an electronic design: it provides your circuit with power. It should be strong enough to provide your circuit with the right amount of current and it should be stable – no fluctuating values. In this compact article I explain the basic of a power supply.
For those of you who want to built a relative simple sine-wave generator, take a look at this circuit (scroll down). For some performances of the Composition department at the Royal Conservatory, we made 6 of these sine-wave generators. They are easy to build and show a relative good quality sine-wave.
This is a photo of the oscilloscope, showing the actual output of the sine-wave generator. Not perfect, but nice!
Some of the recent questions I heard from the students were about filters. The world of filters, whether active or passive, is a complex one. There’s a lot of documentation about this subject and if you have to design a particular filter for a particular frequency, you will encounter quiet complex math. I added some examples of second order LP, HP and Bandpass filters and included some on-line calculators.
Friday 9th of February, I introduced students to the world of the Remote Controlled studio during a 2 hour session at Sonology studio Bea-6. It was an introduction lesson in how to use the RC-studio and how communication can be setup with OpenSoundControl messages (OSC).
Since the big Max/Msp patch that I made for driving the whole setup is quiet a mess (:) when you go out of presentation-mode, I added the core-processes as separate Max/msp patches. In this way it is easier building a patch yourself by adding the core-parts together. You will find patches that can work stand-alone and that generate the right OSC-messages like /v1, /cf, ma, /st and more. Take a look at the download section and find 7 new Max/Msp patches to be experimented with. For more information about the RC-studio, check this.
Example of the ADSR module drive: