CIRCLE WITH A DOT

@Lisasali YouTube appears to have several videos that generate this and other frequencies. You could either watch thwem on YouTube or do what Iwoul;dprobablytryto do,mconvert them to mp3 using one of many tools including TCA Media Dopwnloader. Also, CalmRadio, a subscription service, has several channels that generate sound at different frequencies but don't seem to have 42 hertz.

@nycki96 Sorry to hear about your husband, hope no long-term consequences. glad to hear about your equipment; occasionally the system does work.

@mekkaokereke @quixoticgeek Just another case of affirmative action for white people and big business. Oh, but I forgot, we don't like affirmative action any more. We used to like it in the "good old days!"