• 7 voices / 4-part multitimbral
• Polyphonic, monophonic (single/multi trigger), Unisono modes
• 2 oscillators with 4 waveforms each including PWM
• Oscillator 2 with hardsync
• 2 sub-oscillators
• Noise generator
• Signal mixer
• 24dB Lowpass filter
• Modulatable VCA
• 2 ADSR envelopes with keyboard tracking
• 3 LFOs
• Chorus effect (basic / ensemble)
• Delay effect (stereo / ping-pong, with/without clock sync)
• 512 presets + 128 multi-programs
• Panel mode
• MPE MIDI
• Full MIDI implementation
• Graphic OLED display
• CV inputs for pitch, Cutoff & gain
• Audio input
• MIDI In / Out / Thru
• USB MIDI
• Mono/stereo audio output
• Headphone output

The voice architecture

One voice of the e7 consists of two identical oscillators that generate the sawtooth, sharktooth, triangle and square waveforms with PWM. Square can be combined with one of the other waveforms or used on its own. Each oscillator has a sub-oscillator that resonates one octave below the respective tone generator. Hardsync can be activated in the second oscillator. The fifth signal source is a noise generator, which can be replaced by an external signal via the audio input; all signal sources have their own level control in the mixer. This is followed by an excellent-sounding 24dB lowpass filter and the modulatable VCA. The two well-scaled ADSR envelopes are primarily assigned to the filter and VCA, envelope 1 appears again as a modulation source in the oscillators for Pitch and PWM. There are also three LFOs; LFO 1 and 2 each have 5 waveforms and offer six modes of operation, including Reset and clock sync. The third LFO has 4 waveforms, oscillates freely and is controlled via the modulation wheel or Aftertouch . Further parameters can be accessed via the shift function and the knob labels highlighted in white. The voices can be played polyphonically, polyphonically with dynamic voice distribution in the panorama, monophonically or Unisono .

Chorus and Delay for the final touch

The effects section shines with Chorus and Delay in various versions. All of them sound very balanced with plenty of retro charm and, above all, are easy to use. The chorus effect offers either Basic, which embeds the sound in slightly wafting weaves, or Ensemble, which is based on the string synthesisers of yesteryear. The delay effect offers Stereo or Ping-Pong, both with and without tempo synchronisation. The Delay has a free-running delay range of 50ms to 1.35sec.