[Csnd] RE: midi latency

Date	2012-10-16 10:24
From	Raoul
Subject	[Csnd] RE: midi latency
	On Tuesday Victor Lazzarini wrote: Date: Tue, 16 Oct 2012 11:24:10 +0200 Sender: rmgls@free.fr > Try adding -b64 to the options in CsOptions Hi Victor, with -b64 still the same result. i tried another midi interface with a midi cable; the latency is slightly reduced but still here. coremidi and portmidi produce the same latency time. Please how to track down this: 1: ftgen time consuming 2: time of midi reception 3: time of midi treatment Note: i run csound 5.18.03 from the terminal on osx 10.8 (recent update). thanks Raoul rmgls@free.fr > Victor On 16 Oct 2012, at 08:18, Raoul wrote:=0A= =0A= > Hi all,=0A= >=20=0A= > i tried on osx 10.8 this simple example from the manual.=0A= > with portmidi i get a latency of about 250 ms.=0A= >=20=0A= > so, is it a way to reduce this latency time observed on midi?=0A= >=20=0A= > Note: other softs do not have any latency with the same device:=0A= > a master keyboard with midi wireless transmission.=0A= >=20=0A= > Thanks.=0A= >=20=0A= > Raoul=0A= > rmgls@free.fr=0A= >=20=0A= > =0A= > =0A= > -+rtmidi=3Dportmidi -Ma -odac=0A= > =0A= > =0A= > ;Example by Andr=E9s Cabrera=0A= >=20=0A= > sr =3D 44100=0A= > ksmps =3D 32=0A= > nchnls =3D 2=0A= > 0dbfs =3D 1=0A= >=20=0A= > massign 0, 1 ;assign all MIDI channels to instrument 1=0A= > giSine ftgen 0,0,2^10,10,1 ;a function table with a sine wave=0A= >=20=0A= > instr 1=0A= > iCps cpsmidi ;get the frequency from the key pressed=0A= > iAmp ampmidi 0dbfs * 0.3 ;get the amplitude=0A= > aOut poscil iAmp, iCps, giSine ;generate a sine tone=0A= > outs aOut, aOut ;write it to the output=0A= > endin=0A= >=20=0A= > =0A= > =0A= > e 3600=0A= > =0A= > =0A= >=20=0A= >=20=0A= > Send bugs reports to the Sourceforge bug tracker=0A= > https://sourceforge.net/tracker/?group_id=3D81968&atid=3D564599= =0A= > Discussions of bugs and features can be posted here=0A= > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe = csound"=0A= >=20=0A= =0A= Dr Victor Lazzarini=0A= Senior Lecturer=0A= Dept. of Music=0A= NUI Maynooth Ireland=0A= tel.: +353 1 708 3545=0A= Victor dot Lazzarini AT nuim dot ie=0A= =0A= =0A= =0A= =0A= =0A= Send bugs reports to the Sourceforge bug tracker=0A= https://sourceforge.net/tracker/?group_id=3D81968&atid=3D564599= =0A= Discussions of bugs and features can be posted here=0A= To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe cs= ound"=0A= =0A=

Date	2012-10-16 10:36
From	Victor Lazzarini
Subject	Re: [Csnd] RE: midi latency
	Try the terminal with -+rtmidi=virtual -M0 and then see if the issue is there. This will tell us whether the problem is with the midi device or driver. Also try using -M where is your device number as reported by the console (say start with 0) 1: ftgen does no consume any time 2: 3: should be immediate. Victor On 16 Oct 2012, at 10:24, Raoul wrote: > On Tuesday Victor Lazzarini wrote: > Date: Tue, 16 Oct 2012 11:24:10 +0200 > Sender: rmgls@free.fr > > >> Try adding -b64 to the options in CsOptions > > > Hi Victor, > > with -b64 still the same result. i tried another midi interface with > a midi cable; the latency is slightly reduced but still here. > coremidi and portmidi produce the same latency time. > Please how to track down this: > > 1: ftgen time consuming > 2: time of midi reception > 3: time of midi treatment > > Note: i run csound 5.18.03 from the terminal on osx 10.8 (recent update). > > thanks > > Raoul > rmgls@free.fr > >> Victor > On 16 Oct 2012, at 08:18, Raoul wrote:=0A= > =0A= >> Hi all,=0A= >> =20=0A= >> i tried on osx 10.8 this simple example from the manual.=0A= >> with portmidi i get a latency of about 250 ms.=0A= >> =20=0A= >> so, is it a way to reduce this latency time observed on midi?=0A= >> =20=0A= >> Note: other softs do not have any latency with the same device:=0A= >> a master keyboard with midi wireless transmission.=0A= >> =20=0A= >> Thanks.=0A= >> =20=0A= >> Raoul=0A= >> rmgls@free.fr=0A= >> =20=0A= >> =0A= >> =0A= >> -+rtmidi=3Dportmidi -Ma -odac=0A= >> =0A= >> =0A= >> ;Example by Andr=E9s Cabrera=0A= >> =20=0A= >> sr =3D 44100=0A= >> ksmps =3D 32=0A= >> nchnls =3D 2=0A= >> 0dbfs =3D 1=0A= >> =20=0A= >> massign 0, 1 ;assign all MIDI channels to instrument 1=0A= >> giSine ftgen 0,0,2^10,10,1 ;a function table with a sine wave=0A= >> =20=0A= >> instr 1=0A= >> iCps cpsmidi ;get the frequency from the key pressed=0A= >> iAmp ampmidi 0dbfs * 0.3 ;get the amplitude=0A= >> aOut poscil iAmp, iCps, giSine ;generate a sine tone=0A= >> outs aOut, aOut ;write it to the output=0A= >> endin=0A= >> =20=0A= >> =0A= >> =0A= >> e 3600=0A= >> =0A= >> =0A= >> =20=0A= >> =20=0A= >> Send bugs reports to the Sourceforge bug tracker=0A= >> https://sourceforge.net/tracker/?group_id=3D81968&atid=3D564599= > =0A= >> Discussions of bugs and features can be posted here=0A= >> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe = > csound"=0A= >> =20=0A= > =0A= > Dr Victor Lazzarini=0A= > Senior Lecturer=0A= > Dept. of Music=0A= > NUI Maynooth Ireland=0A= > tel.: +353 1 708 3545=0A= > Victor dot Lazzarini AT nuim dot ie=0A= > =0A= > =0A= > =0A= > =0A= > =0A= > Send bugs reports to the Sourceforge bug tracker=0A= > https://sourceforge.net/tracker/?group_id=3D81968&atid=3D564599= > =0A= > Discussions of bugs and features can be posted here=0A= > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe cs= > ound"=0A= > =0A= > > > > 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" > Dr Victor Lazzarini Senior Lecturer Dept. of Music NUI Maynooth Ireland tel.: +353 1 708 3545 Victor dot Lazzarini AT nuim dot ie