Hi

I too have just got a SB Live - a wonderful card, specialy
since it will play multiple wave streams at the same time.

Anyway my question is about using the four speaker channels -
is it possible to make stuff in CSound that will allow access to
multiple channels and how would I play it on the SBLive.

cheers

mark


> -----Original Message-----
> From: owner-csound-outgoing@maths.ex.ac.uk
> [mailto:owner-csound-outgoing@maths.ex.ac.uk]On Behalf Of Gabriel
> Maldonado
> Sent: 22 October 1998 13:01
> To: Josep M Comajuncosas
> Cc: csound@maths.ex.ac.uk
> Subject: Re: Interpolation schemes and SB Live!
>
>
> Josep M Comajuncosas wrote:
> >
> > Hi all,
> > I recently saw the promotional prospectus of a low-cost PC
> sound card
> > (called MaxiSound or so) and I was *really* disapointed
> with its specs.
> > compared to Csound. Specifically, it is said to use a 3rd order
> > polynomial scheme for wavetable interpolation, when Csound
> only accepts
> > linear (1st order) interpolation.
> > As you may agree this cannot be accepted ;-), I´d suggest
> at least 3 new
> >
> > opcodes, called maybe
> > oscilp
> > tablep
> > deltapp
> > with an additional parameter to choose the polynomial
> degree used for
> > interpolated readout.
> > I´m not very sure about the improvement in the s/n ratio and in the
> > frequency response in relation to the degree of the Lagrange
> > interpolator. Maybe some of you have any clues. But it
> would be nice to
> > implement such feature.
>
> The problem is: does it improve the sound quality? How much
> does it cost in processing
> speed?
> My new SoundBlaster Live has an internal wavetable
> synthesizer who does 8 point
> interpolation in realtime. Actually the sound quality is
> excellent. I don't know if it
> depends of the interpolation algorithm or of the hardware
> analog converter.
>
> Where is it possble to get the algorithm to implement 8 point
> interpolation? If I could
> see an example of it I will implement it in Csound.
>
>
>
> > Another question related to waveguide opcodes. Does deltapi
> (and delayw
> > btw) accept fractional sample delay lengths (well, fractional 1/kr
> > units) ?
>
> Yes it does.
>
>
> > If not, is it expected to implement it soon? Otherwise it could
> > be difficult to tune a delay line at a precise high
> frequency, esp. at
> > low k-rates.
> > This is specially noticeable when developing waveguide models.
>
> The problem is that the first order filters that are
> implemented in the waveguide opcodes
> don't use fractional delay, so the pitch of high notes is not precise.
>
>
> --
> Gabriel Maldonado
>
http://www.agora.stm.it/G.Maldonado/home2.htm