Sunday 18 August 06:20 AM
Yamaha CS-01 
An analog monophonic single oscillator synthesizer. This synth was small, portable and battery powered, yet packed a big punch.
The CS-01 contains controls for the glissando, an ADSR envelope generator (attack, decay, sustain, release), pitch & mod wheels. Available waveforms include triangle, sawtooth, square, and narrow. There is also a pulse width modulation (PWM) waveform with a separate slider controlling the PWM speed. (PWM is a method of reducing the average power delivered by an electrical signal, by effectively chopping it up into discrete parts).
The synth features a 12dB resonant VCF (voltage-controlled filter). Although a second version (Yamaha CS-01 MKII) was released later that had an improved 24dB filter. The latter version had black casing with green lettering- not seen here but I’ll post in my stories.
The CS-01 was sold as a part of Yamaha's Producer Series, including a headphone amp, stereo mixer, and headphones.
Lastly, there was an optional breath controller. What is a breath controller, you ask? A musician could insert a breath controller into their mouth and blow through it. The air velocity was then measured and turned into control data. The control data could be used to open a filter or another parameter to manipulate. A popular synth that had this feature was the Yamaha DX7.
Even though it was marketed towards novices and first time synth buyers, according to Reverb, Synth Museum, and Vintage Synth Explorer, it supposedly sounds pretty good, especially for nice thick bass sounds.
So if you’re looking for a bass synth that is vintage, analog and on the more affordable side, you can get this synth for around $300 these days.
Notable users: OMD, Chick Corea, Dust Brothers.
References: Vintage Synth Explorer, Reverb, eBay, Retro Synth Ads, Wiki, Synth Museum, Sweetwater.