void setPitch(int sourceId, double pitch) {
		AL10.alSourcef(sourceId, AL10.AL_PITCH, (float) pitch);		
		int error = AL10.alGetError();
		if (error != AL10.AL_NO_ERROR) {
			this.logger.logError(LOGGING_SOURCE, "unable to set pitch of open al source (" + sourceId + ") , error: " + error);
			throw new RuntimeException();
		}		
	}