Linear VCAs based on a discrete OTA core
The ADE-50 provides 3 all-analogue voltage controlled amplifiers based on a modern operational transconductance amplifier design.
The VCAs are designed to provide a good balance between the performance and specification of modern ‘on-chip’ VCAs and the character and musicality of classic analogue designs.
The OTA core of each VCA is fully discrete - it is built from only resistors, capacitors and transistors - however, the CV conditioning, audio input and output stages are built using high-quality op-amps giving the best balance between musicality, character and performance.
The ADE-50 provides a good signal-to-noise ratio, linearity, attenuation, an output level at unity gain at 5V CV input, minimal CV ‘bleed’ and minimal output offset/bias.
1) Buy a suitable USB to FTDI(TTL-232R-5V) cable directly or from a 3rd party supplier:
2) Follow the instructions in the manual for downloading and upgrading:ADE-50 Manual: USB to FTDI Cable Driver: Easy uploader Firmware Installer: