>What's a useful %
There is no rules because it depends of the instrument and the
orchestration.
Each effect unit (reverb or chorus) is made of the direct signal (in)
connected to the input reverb through the send (%) value.
Then the direct signal is added to the effect's output to produce the
final output (out). Example for reverb:
in reverb = in * send
out reverb = reverb (in reverb)
out = in + out reverb.
The more is send value the more the reverb sound (out reverb) will
mask the direct signal (in). We hear only the instrument sound coming
from far away.
The less is send value the more direct signal will mask the reverb
ouput. We hear the instrument very near of our ears.
When playing an instrument alone, it is probably important to set send
value to hear a good amount of direct signal.
When playing multiples instruments, different send % produce relative
send effect. For exemple playing a piano accompanying a flute both
with reverb with piano send =10% and flute send = 50%. This will
produce a more reverb for flute than for piano. Note that the send
value produces also an effect relative to the direct signal.
jjc