Forum to discuss all matters relating to the MPC1000 and MPC2500 operating systems created by 'JJ' (all versions).
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By funk doc Sun Oct 07, 2007 6:36 pm
i don't know how using filter in my 2500 mpc,i think it's good to use filter+
eq,but how?i need some tips cuz when i put high or band on sample,i ear
the sample very low.Thanks n advance.
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By bertiebassett Mon Oct 08, 2007 10:32 am
This book is essential reading :D

Image

By LivePsy Mon Oct 08, 2007 11:24 am
You've got a good point, funk doc. It needs a booster after the filter if it drops the volume down - especially if you have to also set the attenuation at 6 or 12 to avoid distortion. One work around is to lower the level of every other pad to help the levels match - either on the mixer screen or turn on the low pass filter with a freq of 99 and attenuation of 12.

Cheers,
B
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By Zukan Tue Oct 09, 2007 11:23 am
Not making sense.

Why would you say that a filter is low on one hand and then attenuate it because it distorts on another?

Filters behave exactly how they are meant to.
When you remove certain energy frequencies you will invariably get attenuation on the overall sound.
If you boost certain energy frequencies then you might need to attenuate them to bring them back in line.

You can also control filter envelopes with velocity, and this is where the power of a filter starts to come in.

This will all be in the dvd we are doing.

By LivePsy Tue Oct 09, 2007 10:31 pm
I'm talking about 2 different things.

Firstly, the level of the pad is usually low if you use a filter, because it is taking out frequencies (yes, it also boosts if you have a high res but the overall result is usually lower in level). And if you use it as I do for EQ, the level is much lower than pads which don't use a filter. So a booster after the filter would level that up.

But also, the damn filter distorts easily with a high level sample so the Att parameter is necessary to lower the level going into the filter. Its not to reduce the level after the filter, its to lower the level going into the filter because it distorts easily. This is a second reason to need a level booster after the filter

You are going to put that into the DVD right? I mean, you are an expert an all...

Cheers,
B
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By Zukan Wed Oct 10, 2007 7:35 am
I know exactly why the attenuation is there but you seem to fail to realise that there are ways of handling the filter output at pad stage without requiring a level booster.

All filters by their very nature will attenuate the overall gain of a signal so it's a given that the levels have to then be matched back up.

But there are numerous ways of doing this, even in the limited mpc, without there having to be a function made available within the os.

The problem with the mpc is that it has really poor filter structuring and they are generally poor in design.

A filter should never distort even when it self oscillates so attenuation and gain drops was a compromise by Akai to compensate for a poorly designed filter.

Attenuation by 6dB stages is simply trying to compensate for bad slopes.

And yes I am a **** expert and I don't won't be including your limited understanding of filter control in the dvd thank you.

By LivePsy Wed Oct 10, 2007 10:05 pm
So we're in vehement agreement, Zukan. In your last post you have not contradicted anything I said. Not sure why we're arguing then.

If you want to elaborate on how to compensate for lower levels then this is the place to do it. Share it with us.

Cheers,
B