Re: Feature Request JAMin

On Wed, February 6, 2013 5:16 am, Michiel Broek wrote:
> On 02/05/2013 05:55 PM, Patrick Shirkey wrote:
>
> Hi Patrick,
>
>
> Just delete a lot.
>
>> Delays are easy to add. We have several plugins available for that.
>>
>> What I am seeing is the following signal chain:
>>
>> input -> stereo  ->eq -> 32/1024 band -> xover
>>
>> |-> pre aux -> ->individual stereo channels -> volume control -> jack
>> out
>> |-> compressors -> stereo -> limiter -> volume -> stereo out
>> |-> compressors-> post aux -> individual stereo channels -> volume
>> control
>>   -> jack out
>> |-> compressors -> limiters -> individual stereo channels -> volume
>> control  -> multiple jack outs
> At the stereo out level you would have:
>
>
> xover-out-lo level  delay limiter output
> xover-out-mi level delay limiter output
> xover-out-hi level delay limiter output
>
> And that for left and right. No compressors in the output drivers, just
> limiters to protect the speakers.
> You draw the compressors before the stereo out/xover, that is a good
> place in the chain.
>
> If you use the usual 3 band compressor that is now in Jamin, then please
> note that the crossovers for the multiband compressor have different
> frequencies then the crossovers in the output stages. The compressors
> have more a functional choice of the crossover frequency, while the
> output crossovers are dictated by the speaker systems. It could be more
> or less then three output drivers and even just one if you should drive
> a full-range system.
>

To be precise, the output values from the compressors are summed into a
stereo signal before being fed to the limiter. IIUC you are suggesting an
option to bypass the compressors completely and add individual delay +
limiters + stereo output for each band in the xover.

That is effectively the "pre aux" output mode.

For the "post aux" output mode are you suggesting an additional xover?

For both options I need to keep the 3 x stereo signals post
xover/compressor and send them to 3 x stereo jack outputs with 3 x stereo
delay+limiter+volume controls.

Both modes (pre/post aux) can be easily handled with the compressor bypass
toggles. Also we already have delays on the output for the low and mid
band compressors.  So it seems that it would be useful to have more
advanced control of the settings directly in the main UI?

I'm thinking of the best way to handle that in the UI. We could add a
"tabbed" view to each compressor to display the delay control, limiter and
volume for each band by making the "delay" label clickable. Other
suggestions welcome.

I'm not sure why we don't have delay on the high band compressor. Does
anyone recall why that was not deemed necessary at the time?



> Now that I wrote this down, it looks more an extension of the existing
> Jamin with extra outputs via crossovers, then a change in the original
> Jamin design.
>
>
>> That provides a decent amount of flexibility but limits us to a maximum
>> of
>> 3 stereo channels of output.
>>
>> To give us more channels we would need to add support for more
>> compressor
>> chains. I'm not sure how the xover would be affected by having more than
>> 3
>> output paths. What is the general method for dealing with that case?
>>
> That is not needed, jus leav it that way and add the extra outputs.
>
>
>>> Most hardware units have a smaller eq (31 bands) then Jamin has. In
>>> addition there are notch filters on some of them to suppress feedback.
>>> I
>>> hate that but sometimes you really need them. The current eq can do
>>> that
>>> too so I think you won't need to add that.
>>>
>>> There are also units that have an input delay for larger ranges. That's
>>> only useful for very large venues where you place extra stacks away
>>> from
>>> the main stage. But it can be useful in small theaters as well if you
>>> have extra speakers on a balcony or something like that. More for fixed
>>> systems but it can be a nice addition.
>>>
>> We can add an input delay but currently we only have stereo inputs. Is
>> there a need for more?
>
> I don't think so. The idea is to chain these processors, but they can be
> fed from one stereo source. The main unit does not need a delay, but
> units with amps and speakers  further away from the stage need a delay
> to prevent echo effects for the audience. However, this can be done with
> a number of jack-racks with a delay plugin too. Or make jamin allow for
> extra plugins in the input stage.
>




--
Patrick Shirkey
Boost Hardware Ltd

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