fx_delay
#define fx_env2_delay fx_delay /* [0,5900] 4msec */
#define fx_lfo1_delay fx_delay /* [0,5900] 4msec */
#define fx_lfo2_delay fx_delay /* [0,5900] 4msec */
static int fx_delay(int val);
#define fx_env1_delay fx_delay /* [0,5900] 4msec */