| Author | Message | ||
| crgaston
Intermediate Member Username: crgaston Post Number: 140 Registered: 11-2005 |
Is the damping ratio knob basically the same as a CVQ knob on a Series II? | ||
| davehouck
Moderator Username: davehouck Post Number: 3533 Registered: 5-2002 |
I believe the answer to that question is yes. | ||
| davehouck
Moderator Username: davehouck Post Number: 3534 Registered: 5-2002 |
According to the SF-2 manual, "the damping ratio, also referred to as "Q", works with the filter. It adds a resonant peak to the frequency selected by the Frequency Control." | ||
| strangerones
Member Username: strangerones Post Number: 52 Registered: 11-2004 |
I've been wonrering about this knob as well. "It adds a resonant peak to the frequency selected by the Frequency Control." I don't know what that means. | ||
| crgaston
Intermediate Member Username: crgaston Post Number: 141 Registered: 11-2005 |
Thanks, Dave. I was thinking that was the answer. Now I just have to pinch myself a few times to make sure I'm not dreaming. I just got my Superfilter, and am totally jazzed about (eventually) having that capability on an instrument as well. I'm finding that I'm really liking both channels as a low pass, one set around 100 and one set around 700, with the Damping Ratio knobs around 3. Those settings work great, but that's just in my basement, though...we'll see how they hold up on a stage with other people tomorrow. James, "...adds a resonant peak to..." is Alembic-speak for "boosts." Charles | ||
| davehouck
Moderator Username: davehouck Post Number: 3538 Registered: 5-2002 |
James; there's a good description of how the Q switch works with the filter here. The same principal applies to the CVQ and the damping ratio control. | ||
| the_8_string_king
Intermediate Member Username: the_8_string_king Post Number: 108 Registered: 9-2005 |
As you roll the low-pass filter gradually from the "maximum treble" position to the other extreme, it "horizonally" filters out first the upper treble, then (also) the middle treble, then (also) the lower treble, then (also) the upper mid-range, then (also) the middle mid-range, then (also) the lower mid-range, until you reach the other extreme, at which point your left with (mainly) the lows, which are passed by the filter -hence the term "low-pass" filter (as opposed to the other filter options on the superfilter -band-pass and high-pass.) The "Q" is a boost; it follows the filter frequency; for example, if you turn on the Q at the extreme treble position, you'll get an upper treble boost -which some refer to as "presence"; if you turn the filter a little, THAT frequency (the upper treble) -which was just boosted- is now filtered out, and the middle treble is now boosted; turn the filter a little more, and THAT frequency is now cut, and the lower treble will be boosted by the Q; turn it a little more, and THAT frequency will now be cut by the filter, and the Q will boost the upper mid-range; turn it a little further, and the upper mid-range will be filtered out, and the Q will boost the middle mid range... and so on and so forth. I don't think Skylarks have Q switches for their filters, do they? Of course, this description applies to the Q when used with a low pass filter; I believe it would function in the reverse in the high-pass mode. A minor point, but I believe the superfilter "Q" is spec'ed to a maximum 12 db, whereas the Series II instruments CVQs go up to 15 db. Of course, 12 dbs of Q should be more than enough; my custom Europas Q can go up to 12 dbs, but I rarely use it at maximum. | ||
| lbpesq
Senior Member Username: lbpesq Post Number: 1155 Registered: 7-2004 |
IIRC, I believe the SF-2 covers even a wider frequency range than a Series II. Bill, tgo | ||
| strangerones
Member Username: strangerones Post Number: 53 Registered: 11-2004 |
I understand now. Thanks everyone  I'll have to play with it some more keeping that in mind. | ||
| davehouck
Moderator Username: davehouck Post Number: 3544 Registered: 5-2002 |
Charles and James; Have fun with your SF-2s! |
