Dear community,
I've read in the manual about sfplay:

ar1, ar2 sfplay ivel, inotenum, xamp, xfreq, ipreindex [, iflag] [,
ioffset] [, ienv]
I would like to ask:
how can I use a microtonal-scale generated with cpstmid e.g. with this opcode?


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Hi Stefan,

It seems that there is not a frequency to midi converter opcode, but
something like this will do it:

ifreq cpstmid itable
inotevalue = (69. + (1./.057762265) * log( ifreq / 440.))
(modified from the max manual)

- Joel

On 28 February 2011 09:03, Stefan Thomas
 wrote:
> Dear community,
> I've read in the manual about sfplay:
>
> ar1, ar2 sfplay ivel, inotenum, xamp, xfreq, ipreindex [, iflag] [,
> ioffset] [, ienv]
> I would like to ask:
> how can I use a microtonal-scale generated with cpstmid e.g. with this opcode?
>
>
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>


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Dear Aaron,
thanks very much!
I will try Your code!

2011/2/28 Aaron Krister Johnson :
> Stefan,
>
> This is (somewhat) equivalent to what Joel is saying:
>
> inotenum  = int(round((log(ifreq/440)/log(2))*12))+69
>
> I just want to point out that you want to feed the 'inotenum' so the nearest
> sample to the target pitch is chosen in the sample bank....of course, the
> actual frequency is fed into the 'xfreq' parameter....make sure 'iflag' is
> set to '1' so that 'xfreq' is interpreted correctly as the literal pitch you
> want (i.e. 'inotenum' is just there so that the nearest sample is chosen,
> really)
>
> Caveat emptor---certain soundfonts I've tried (notably Campbell's tuned
> harpsichord) seem REALLY loud when used by sfplay, to the point of
> distortion. I don't know if it's a bug, but I've found by experiement that
> if you have a really distorted, loud sound, it helps to put a 'xamp'
> correction factor in there, where xamp is between 0 and 1....
>
>
> AKJ
>
>
> On Mon, Feb 28, 2011 at 8:22 AM, Joel Ross 
> wrote:
>>
>> Hi Stefan,
>>
>> It seems that there is not a frequency to midi converter opcode, but
>> something like this will do it:
>>
>> ifreq cpstmid itable
>> inotevalue = (69. + (1./.057762265) * log( ifreq / 440.))
>> (modified from the max manual)
>>
>> - Joel
>>
>> On 28 February 2011 09:03, Stefan Thomas
>>  wrote:
>> > Dear community,
>> > I've read in the manual about sfplay:
>> >
>> > ar1, ar2 sfplay ivel, inotenum, xamp, xfreq, ipreindex [, iflag] [,
>> > ioffset] [, ienv]
>> > I would like to ask:
>> > how can I use a microtonal-scale generated with cpstmid e.g. with this
>> > opcode?
>> >
>> >
>> > Send bugs reports to the Sourceforge bug tracker
>> >            https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> > Discussions of bugs and features can be posted here
>> > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> > csound"
>> >
>> >
>>
>>
>> Send bugs reports to the Sourceforge bug tracker
>>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> Discussions of bugs and features can be posted here
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> csound"
>>
>
>
>
> --
> Aaron Krister Johnson
> http://www.akjmusic.com
> http://www.untwelve.org
>
>


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