2nd TANR Prototype, workshop ready.

2nd TANR Prototype, workshop ready.

TANR is a tiny AVR based synthesizer. It is not too far from Ljudmaskin, but there are few differences. Most important is that it has more touch contacts. It has three main contacts that are chained with resistors two form additional contacts. I have also added a potentiometer that is used to change modes between different synthesis algorithms.

There are two main influences for my synth. First one is Lumenoise, an audiovisual synthesizer by Niklas Roy. Those of you who have had a chance of trying this thing, know that its synthesis algorithm is a weird mix of control and total lack of control, both at the same time. I wanted to have something that would have the same feel than Lumenoise. This is where the synthesis algorithm kicks in. I have done workshop about algorithmic music players. That workshop was based on concept of ‘one line symphonies’ by Finnish demoscene veteran Viznut.

The circuit diagram of TANR. The circuit consists of Attiny85 and lm386.

The circuit diagram of TANR. The circuit consists of Attiny85 and lm386.

The schematics of TANR show that most of the magic happens in software. How TANR works is that it is using bunch of one line symphonies, switching between them and modulating their parameters based on readings from touch contacts, number of clock cycles etc. I think there is a tiny pinch of astrology in the algorithms as well. With high refresh rates one gets nicely colored and in a way harmonic noises and on some settings effects or even melodies. I’m still in the process of polishing and rewriting the software bit so wont include it here (yet). End result is this:
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Soothing sounds of TANR.

As in my previous workshops, no PCBs were used. Instead spot board and insulated metal wire was used. New innovation on this workshop was to use a photo with final layout between components and the board to help with placement of the components. I have to say that project like this starts to be at the limits of spotboard technique and might be that after working months with DIMI, I’m fluent Eagle user, could have proper PCBs made in the future iterations. Although I think it is useful to master creating circuit boards from scratch with spot board.

Workshop results!

Workshop participants and couple finished synths!

As always I’m up to giving this workshop few times in the future. This workshop is suitable with people with previous experience on soldering and it takes around 5 hours to finish. Drop me a line if you would be interested in organizing one!