The Digital Delay 59B is Modcan's first foray into the world of 16 bit, high sample rate Digital Signal Processing (DSP). The 59B is not intended as a replacement for the Super Delay 30B, but as an alternative source of delay effects. Some of the benefits of Digital Delay over BBDs are very low noise, 20Hz - 20kHz frequency response, delay time synchronized to tempo and stereo effects.
While the 59B is able to provide a high dynamic range and wide/flat frequency response, it also provides some selectable filtering to emulate the warmth and resonance of analogue delay units. In OFF position, no filtering is applied and the module provides delay with mirror-like accuracy. For emulation of analogue units, a lowpass filter ( LP II ) with a 2kHz rolloff provides a somewhat warmer color. A 3kHz filter ( LP I ) with slight peaking is reminiscent of the resonance found in analogue delay units.
Delay times are divided into four ranges
1/ 20uS - 50mS- flanger range
2/ 50mS - 600mS
3/ 600mS - 2.4Sec.
4/ 2.4Sec. - 5.8Sec.
Mono mode as indicated by the "M" prefix on the mode range switch
is mixed with the dry signal on the Left/ Mono output. The Right output is internally connected to the Feedback Loop Out Jack and contains the wet delay signal only. This allows the user to externally process the feedback signal path with filters or frequency shifter modules etc. The Feedback Amt pot controls the level of feedback. Listen to the Feedback.MP3 for an example of external feedback processing.
Stereo or "Ping-pong" mode
Stereo mode is indicated for those ranges with an "S" prefix.
Delay times are the same as for Mono mode.
From a mono input the delayed output is ping-ponged left and right adding movement to the sound. The Left and Right jacks are the outputs.
The external feedback path is disconnected in this mode and the internal
Regen controls the number of echo repeats.
The input is sampled when the Tap Tempo is momentarily depressed and looped in an infinite cycle with the end loop point set by the Delay pot.
The loop is output through the Left/mono channel.
Firmware design by Eric Brombaugh.
Sample Rate: 45kHz
Sample Resolution: 16-bit
Max sample delays: 262,144 (5.8s)
Output: typical 2V RMS@1Kohms
Input: typical 5V pk-pk@100Kohms
Input CV: 0 - +5V @100Kohms
Trig Inputs: Min +4V @100Kohms
Power: +15V @180mA, -15V @20mA
High regen and medium delay shows the delays ability to create a "hanging"
wash of sound that is both mellow yet detailed. The sound source is
filtered with a sweeping cutoff.
Demo with the Frequency Shifter 39B in the external feedback path.
Each new echo is shifted from the last.
Stereo effect demonstrating the ping-pong mode
Another example of ping-pong
Showing off the lowest range delay times.
Delay time is synchronized to analogue sequencer clock.
As the sequence tempo changes so does the delay time.
Long delay times for generating rounds and canonic melodies
More to come