ROBOTC Sounds• ROBOTC with the VEX has a speaker port

available on it for playing basic and polyphonic tones.

• You can play the follow types of sounds:– A specific note – PlayTone();– A system sound – PlaySound();– A user loaded sound file (.wav) – PlaySoundFile();

Playing Sounds

• PlayTone(frequency, durationIn10MsecTicks); – Example: PlayTone(440, 10);– Plays a 440hz note for 100ms.

• PlaySoundFile(“fileName.wav”)– Will play the sound file “fileName.wav”. – Use the “File Management” Utility for

downloading sound files onto your VEX• Robot – Advanced Tools – File Management

Playing Sounds

• PlaySound(sound);– Plays a specific sound effect that is pre-programmed

into the VEX• soundBlip• soundBeepBeep• soundDownwardTones• soundUpwardTones• soundLowBuzz• soundFastUpwardTones• soundShortBlip• soundException• soundLowBuzzShort

Sound Variables• bSoundActive– A Boolean variable informs the user if the VEX is

actively playing a sound. Returns “true” if a sound is playing, “false” if no sound.

• bPlaySounds– A Boolean variable to “mute” the VEX. Set

bPlaySounds to “false” to mute the VEX. Set bPlaySounds to “true” to unmute the VEX.

– The #define shortcuts are also acceptable: • MuteSound();• UnmuteSound();

Sound Queue• The VEX has an internal queue in order to line up

sound commands.– This queue will automatically process any waiting sound

commands, in order that they are received.– You can override/check on the queue with the following

commands:• PlayImmediateTone(frequency, durationIn10MsecTicks);

– This command will force the “playTone” command to jump ahead of the queue.

• bSoundQueueAvailable– A Boolean Variable to check if the sound queue is full. Returns a

“true” if there is space available, “false” if the queue is full.

VEX File Management

• The file management utility allows you to see all of the programs, sound files and other files that are loaded on your VEX.

VEX File Management

• From the file management utility, you can..– Upload files– Download files– Run/Stop Programs– Delete files– Create custom

firmware images– Check space available

on the VEX