[PD] Sigmund~ and tracks.

[William Brent]

Hi Julian,

I just looked at the patches and I hear what you're talking about now.
 The erratic changes are because it's really hard to get nice smooth
tracks by analyzing this kind of signal.  With violin samples I got
useable results, but the rougher timbre of your viol has a lot of high
frequencies that emerge and disappear unpredictably.  I think that
getting 48 stable tracks out of it is probably a lost cause...even
with only 10 it was pretty bad with sigmund~'s default settings.

The only way I could imagine improving things is to use the flag that
shows up with each track list to indicate whether it's a new track or
a continuation of an old one.  With that information, you could try
fading in new tracks on free oscillators in the bank to avoid the
sudden discontinuity when frequency jumps by a huge amount.  Data from
a continuing track could safely be sent to the same oscillator.  I
guess you could also EQ it to get rid of those unpredictable high
frequencies - I plotted the spectrogram and the most troublesome ones
are above 2500Hz.  Of course, that would also put a big damper on the
timbre you're interested in...

I wish I had a great solution for you, but this is a tough one.
Assigning frequencies to specific oscillators in your bank based on
track flags really seems like the best bet.



On Fri, Feb 11, 2011 at 4:54 PM, J bz <jbeezez at gmail.com> wrote:
> Right then,
>
> I have only sent one sample only:
> '7_45_A_violadamore.wav' (7-string number, 45-midi number, A-note)
> which you will need to send into sigmund~ - I'm using
> [throw~ viola_samples]
> to get it in.
> From sigmund~ it goes into '[pd sine_output] then thrown to
> [sines] which has a switch~, top right.
>
> I'm using GEM and MSD to create a 'swarm' which has the partials mapped to
> it so I haven't included my output~ as that would mean including loads of
> extra files.
>
> So you will need an output~ to [catch~] the 2 track [throws~]
> [throw~ revsound_L]
> [throw~ revsound_R]
>
> I suppose it's quite possible that as your not receiving any pan info the
> audio will be stuck either left or right anyway?
>
> What I was trying to achieve with the
> [attdec_gen2]
> inside
> [sine_rev_gen_2]
> was a simple attack and decay but what is happening is that they are being
> triggered all the time, aargh.
>
> I would really like the amp and freq from sigmund~ to be as quick and as
> smooth as possible, so any assistance with that will be hugely helpful.
>
> As I'm not hugely confident in my programming abilities please point out any
> obvious mistakes and any and all tips and tricks/elegant solutions
> gratefully accepted.  Really appreciate the help people.
>
> Cheers,
>
> Julian
>
>
> On 11 February 2011 21:18, J bz <jbeezez at gmail.com> wrote:
>>
>> Hey William,
>>
>> Many thanks for offering to have a look at this for me.  I'm currently
>> trying to extricate the offending section out of what has now ballooned up
>> into a very involved patch (certainly for me anyway).  In the process of
>> doing this I have realised that I am mistakenly constantly sending attacks
>> and decays to the[osc~]'s.  It would probably be best for me to just send it
>> 'as is' rather than trying to sort it out.  I'm somewhat in over my head
>> with this as it is (maybe not always a bad place to be) and could really do
>> with some advice/help/coding-elegance as my brain is starting to melt.
>>
>> Mathieu,
>>
>> If you mean the tuning of the viola, yes it's the standard D Maj tuning,
>> low to high A D A D F# A D.
>>
>> Very best wishes,
>>
>> Julian
>>
>> P.S. Back soon
>>
>>
>>
>> On 10 February 2011 23:16, Mathieu Bouchard <matju at artengine.ca> wrote:
>>>
>>> On Thu, 10 Feb 2011, William Brent wrote:
>>>
>>>>> I'm doing a piece with a viola d'amore (7 string viol)
>>>>
>>>> Oops, that's not a violin :)  I don't know the lowest note on that one
>>>> offhand...
>>>
>>> Is everybody only ever using the default tuning on those things ?
>>>
>>>  _______________________________________________________________________
>>> | Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC
>>
>
>



-- 
William Brent
www.williambrent.com

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