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Programming >> Sound, Music and Video >> Using variables in SOUND command
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Using variables in SOUND command
Post by cinningbao on May 14th, 2010, 6:11pm

hi,

I've got an actual BBC master, but I can't believe the language is much different!..
Anyway, I'm trying to build a program which allows me to manipulate the SOUND and ENVELOPE parameters individually, and save presets.. that kind of thing. But I noticed I need to also send &11 and &1010 to the channel parameter, along with other non-numeric values, which can't be done with the single C numeric variable I'm using.
So, I change the C value to C$, but now the SOUND command complains of a 'Type Mismatch'. eg SOUND C$,1,100,200.

How to I program my way around this?

Many thanks smiley
Re: Using variables in SOUND command
Post by admin on May 14th, 2010, 9:36pm

on May 14th, 2010, 6:11pm, cinningbao wrote:
I need to also send &11 and &1010 to the channel parameter, along with other non-numeric values, which can't be done with the single C numeric variable I'm using.

Why not? You could define a number of constants such as:

Code:
      channel = 1
      flush = &10
      hold = &1000

then you can build your variable C by combining them as required:

Code:
      C = channel + flush + hold
      SOUND C,1,100,200

Quote:
So, I change the C value to C$, but now the SOUND command complains of a 'Type Mismatch'

Using a string variable seems unnecessarily complicated to me, but if that's the way you want to do it you can convert the string to a numeric using EVAL:

Code:
      C$ = "&1011"
      C = EVAL(C$)
      SOUND C,1,100,200

Richard.
Re: Using variables in SOUND command
Post by cinningbao on May 16th, 2010, 2:19pm

Hi Richard,

Thanks for your reply - I went wrong thinking that a string variable was required for anything but numerical values (including the ampersand); I'll now be able to finish what I started!

Cheers smiley