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103 lines
3.7 KiB
Plaintext
103 lines
3.7 KiB
Plaintext
{{DISPLAYTITLE:_SNDBAL}}
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The [[_SNDBAL]] statement attempts to set the balance or 3D position of a sound.
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{{PageSyntax}}
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: [[_SNDBAL]] {{Parameter|handle&}}[, {{Parameter|x!}}][, {{Parameter|y!}}][, {{Parameter|z!}}][, {{Parameter|channel&}}]]
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{{Parameters}}
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* ''handle&'' is a valid sound handle created by the [[_SNDOPEN]] function.
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* {{Parameter|x!}} distance values go from left (negative) to right (positive).
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* {{Parameter|y!}} distance values go from below (negative) to above (positive).
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* {{Parameter|z!}} distance values go from behind (negative) to in front (positive).
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* {{Parameter|channel&}} value 1 denotes left (mono) and 2 denotes right (stereo) channel (beginning with '''build 20170811/60''')
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{{PageDescription}}
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*Attempts to position a sound in 3D space, or as close to it as the underlying software libraries allow. In some cases, this will be true 3D positioning, in others, a mere volume adjustment based on distance alone.
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*Omitted x!, y! or z! [[SINGLE]] values are set to 0 or not changed in '''build 20170811/60 onward'''.
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*By setting the x! value to -1 or 1 it plays the sound at full volume from the appropriate speaker.
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*Sounds at a distance of 1 or -1 are played at full volume. Sounds further than a distance of 1000 cannot be heard.
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*The volume decreases linearly (at a constant gradient) over distance. Half volume = 500.
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* An "'''Illegal Function Call'''" error can occur if another sound is using the primary or same channel position.
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* Opened sound files must have the [[_SNDOPEN|"VOL"]] capability to use this statement in versions '''before build 20170811/60.'''
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{{PageExamples}}
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''Example 1:''
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{{CodeStart}} '' ''
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h& = {{Cl|_SNDOPEN}}("LOL.wav", "SYNC,VOL")
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{{Cl|_SNDBAL}} h&, 1
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{{Cl|_SNDPLAY}} h& '' ''
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{{CodeEnd}}
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''Example:'' Loading a sound after '''build 20170811/60''' - no need to specify "sound capabilities" in [[_SNDOPEN]].
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{{CodeStart}}
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s& = {{Cl|_SNDOPEN}}("song.ogg")
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{{Cl|PRINT}} "{{Cl|READ}}Y"; s&
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{{Cl|_SNDPLAY}} s&
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{{Cl|_SNDLOOP}} s&
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xleft = -1
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xright = 1
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DO
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k$ = {{Cl|INKEY$}}
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{{Cl|SELECT CASE}} k$
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{{Cl|CASE}} "f"
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xleft = xleft - 0.1
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{{Cl|_SNDBAL}} s&, xleft, , , 1
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{{Cl|CASE}} "g"
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xleft = xleft + 0.1
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{{Cl|_SNDBAL}} s&, xleft, , , 1
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{{Cl|CASE}} "h"
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xright = xright - 0.1
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{{Cl|_SNDBAL}} s&, xright, , , 2
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{{Cl|CASE}} "j"
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xright = xright + 0.1
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{{Cl|_SNDBAL}} s&, xright, , , 2
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{{Cl|CASE}} "n"
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volume = volume - 0.1
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{{Cl|_SNDVOL}} s&, volume
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{{Cl|CASE}} "m"
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volume = volume + 0.1
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{{Cl|_SNDVOL}} s&, volume
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{{Cl|CASE}} "p"
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{{Cl|_SNDPAUSE}} s&
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{{Cl|CASE}} " "
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{{Cl|_SNDPLAY}} s&
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{{Cl|CASE}} "i"
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{{Cl|PRINT}} {{Cl|_SNDPLAYING}}(s&)
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{{Cl|PRINT}} {{Cl|_SNDPAUSED}}(s&)
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{{Cl|SLEEP}}
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{{Cl|CASE}} "b"
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{{Cl|_SNDSETPOS}} s&, 110
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{{Cl|CASE}} "l"
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{{Cl|_SNDLIMIT}} s&, 10
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{{Cl|PRINT}} "LIM"
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{{Cl|SLEEP}}
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{{Cl|CASE}} "k"
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{{Cl|_SNDSTOP}} s&
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{{Cl|CASE}} "c"
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{{Cl|_SNDCLOSE}} s&
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{{Cl|SLEEP}}
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s2& = {{Cl|_SNDOPEN}}("song.ogg")
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{{Cl|CASE}} "d"
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s2& = {{Cl|_SNDCOPY}}(s&)
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{{Cl|_SNDPLAY}} s2&
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{{Cl|END SELECT}}
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{{Cl|LOCATE}} 1, 1
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{{Cl|PRINT}} xleft, xright, volume, {{Cl|_SNDGETPOS}}(s&); " "
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LOOP
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{{CodeEnd}}{{small|Code by Johny B}}
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{{PageSeeAlso}}
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*[[_SNDOPEN]], [[_SNDVOL]], [[_SNDLIMIT]]
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{{PageNavigation}}
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