Good evening.
Alas, the PAL standard makes sense to use 50 hertz. You need to use the NTSC standard there is just 60 hertz.
sdtv_mode=0 or 1
audio_pwm_mode=0
Read https://4pda.ru/forum/index.php?showtopic=802556&view=findpost&p=87392162 only on russian.