I think that it is a bug with your version because your example works
here with a recent version of csound.

tito

On Fri, Jul 20, 2012 at 12:47:20PM -0400, Art Hunkins wrote:
> Thanks, Tito. The revised f table indeed permits ctrl7 to reach full volume 
> (1).
> 
> However, now tab exhibits the same behavior as table, i.e., the note 
> initializes to full on before ctrl7 continues with the expected amplitude 
> behavior.
> 
> Clearly, something is wrong with the way in which tab and table interact 
> with GEN16 (here in f1). Perhaps part of the problem is in the way ctrl7 
> "initializes" (or rather, puts out nothing until it is moved).
> 
> The only way to get proper performance and a full range of 0-1 for ctrl7, 
> is to use your revised f table *and* add the line:
> ctrlinit 1, 7, 0
> at the beginning of instr 1. (Then both tab and table work as expected.)
> 
> I don't believe *either* of these additions should be necessary, and would 
> appreciate a developer investigating and fixing this elusive bug.
> 
> Art Hunkins
> 
> ----- Original Message ----- 
> From: "Tito Latini" <tito.01beta@gmail.com>
> To: <csound@lists.bath.ac.uk>
> Sent: Friday, July 20, 2012 4:56 AM
> Subject: Re: [Csnd] tab/table anomoly
> 
> 
> >it works
> >
> >f1 0 16385 16 0 16384 6 1
> >
> >tito
> >
> >On Thu, Jul 19, 2012 at 09:51:11PM -0400, Art Hunkins wrote:
> >>I don't understand the action of tab, or its substitute, table, in the 
> >>.csd
> >>below.
> >>
> >>The example uses a MIDI volume control (typically controller 7) to vary 
> >>the
> >>amplitude of a sine wave.
> >>
> >>With *tab*, controller response is normal until it reaches max (1), where
> >>it drops precipitously to zero; once below max, it resumes normal 
> >>behavior.
> >>
> >>With *table* (replacing tab) and controller 7 preset to 0, the example
> >>initializes at full volume. When the controller is raised, output reverts
> >>to what is expected, and continues normally.
> >>
> >>I presume the problem has to do with converting or interpolating 
> >>different
> >>kinds of numbers - or having to do with the way 0 and 1 are handled by 
> >>tab
> >>and table. I'm running Csound 5.06 on Windows XP (if this is a factor).
> >>
> >>Explanations?
> >>
> >>Art Hunkins
> >>
> >>
> >><CsoundSynthesizer>
> >><CsOptions>
> >>
> >>; for Windows, Mac
> >>-odac -M0 -b128 -B2048
> >>; for Linux
> >>;-odac -+rtaudio=alsa -+rtmidi=alsa -M hw:1,0 -b128 -B2048
> >>
> >></CsOptions>
> >><CsInstruments>
> >>
> >>sr = 44100
> >>ksmps = 100
> >>nchnls  =       2
> >>
> >>       instr 1
> >>
> >>k1 ctrl7    1, 7, 0, 1
> >>k2      tab      k1, 1, 1
> >>k2      port     k2, .01
> >>a1      oscil    5000 * k2, 440, 2
> >>       outs     a1, a1
> >>
> >>       endin
> >>
> >></CsInstruments>
> >><CsScore>
> >>
> >>f1 0 16384 16 0 16384 6 1
> >>f2 0 16384 10 1
> >>i1 0 60
> >>
> >></CsScore>
> >></CsoundSynthesizer>
> >>
> >>
> >>
> >>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"
> >
> 
> 
> 
> 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"