Ostrawa

A four-channel stereo voltage-controlled mixer in 20 HP: each channel has a stereo input (a mono source in L sits in the centre), a volume with a natural fader curve, a balance, an auxiliary send switchable pre or post-VCA, clickless muting and a five-bar level meter, with CV over volume and balance. Stereo sum outputs with soft saturation, a stereo aux send and return, direct inputs to stack sub-mixes, and the Bohumin and Ustka expanders.

Key features

• Four stereo channels, R normalled to L for mono sources
• VOL with VCA control (CV normalled to 8 V), BAL with ±5 V CV, 3 dB pan law
• AUX SEND per channel to a stereo send, pre or post-VCA, with a stereo AUX RETURN
• ACTIVE | AUX PRE button: clickless mute, aux mode shown green (post) or yellow (pre)
• Five-bar post-fader level meter per channel, soft clipping above 16 Vpp
• DIRECT INPUTS and chaining of several Ostrawa and Praga units