A musical Instrument for the kid in all of us who likes electronic adventure

RS Theremin

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Excellent Software Theremin Pitch Tuner with a Fast Response.

Display - precision notes - amplitude - frequency - basic wave shape. 

It makes use of any Win 98 to Win 8.1 computer using the microphone input of a sound card. 

Download the tuner v1.3 (286k) Freeware

Visit William Andrew Steer PhD for his other well thought out and interesting programs.

Some sound cards invert the scope trace.

One favorite method in using this tuner is to place an AM Radio underneath the Pitch side of your theremin tuned to the theremin AM frequency, listen for the theremin tone as you tune. For the EtherWave Standard this frequency is around 572 kHz & 858 kHz. Then feed the radio earphone jack output into the computer sound card. This way the signal is constant and the volume control has no affect on the signal strength driving the display. 

Most likely your AM radio jack is not stereo and you will need to a use mono male TS at the radio to female TRS adapter  on the opposite side for the TRS cable to plug into. The sound card must use a TRS stereo cable or it shorts it out.

"Some engineers have a need to make things appear complicated, that is how they make their money".

All this can be done for Free!

If the sampled audio is too weak or not clean the display remains dim. If the input signal is too loud into the computer input then the display is red. The theremin is a perfect sound source for this software.

Use the radio volume control to set the be level into the sound card and this tuner program.

Validate the Pitch Field with the above Tuner and a print out of the piano scale below.

I Created a PDF file to print one octave with the spacing of a piano keyboard, I then tape three graphics together on a wooden yardstick to make a reference strip between me and my theremin antenna.

Three of these strips end to end make a good three octave reference. 

Theremin antenna tuning and octave spacing is not a conversation your going to readily find on the internet. It is a difficult subject to technically understand and control. Most Thereminist learn to play within non-linear pitch fields, adapting and remaining with a specific playable theremin model. 

Until perfect pitch linearity comes about on all theremins, there will be large playing control inconsistencies from model to model. Why do so many people prefer the Moog EtherWave Pro? It plays with the comfort found in a linear pitch field. I don't know if it is ever mentioned publicly in Moog circles but people have sent me emails that they did not like the original sound of the Pro out of the box. 


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