Doepfer A-199 Spring Reverb - Manual (Page 4)

A-199 Spring Reverb System A - 100 doepfer
4
4. In- / Outputs
! Audio In
The audio signal to be provided with the reverb effect
is fed into audio input !.
" ext. Feedback In
If you want to make use of the external feedback
feature socket " is used as input for the feedback
signal (refer to chapter 5: user examples).
H The feedback input " is a normalled socket.
This means that the reverb output § is used as
feedback signal unless a signal is patched into
socket ". As soon as a plug is inserted into
socket " the internal feedback path is interrup-
ted. Control 2 is the attenuator for the internal
or external feedback signal.
§ Reverb Out
At this output the pure reverb signal is available.
$ Mix Out
At this output the mix signal containing original and
reverb signal is available (relation is adjusted with 4).
5. User examples
Apart from the evident application - i.e. reverb simula-
tion - the module can be used for timbre modification
as spring reverb systems show a very characteristic
sound.
The reasons for this behaviour are (insufficient) me-
chanical properties of the springs like signal delays,
audio resonances, limited frequency range, acoustic
feedback behaviour, sensitivity to mechanical shocks
and others. But just these features make the spring
reverb unmistakable.
Already the controls Feedback and Emphasis allow a
lot of very interesting sound modifications and unusual
reverb effects.
Fig. 2 shows the realization of a frequency-selective
reverb. By means of a filter bank (A-128) certain
frequencies of the original signal are emphasized or
suppressed before the signal is fed into the spring
reverb module A-199. Mixing the original signal with
the frequency-selective reverb signal generates very
interesting sound effects.