Real time low frequency over Whatsapp

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
I was figuring out how to send low frequencies signals real time over Whatsapp. Say 20 to 200 Hz. The mic circuit probably only carries 300 to 5000 Hz. So maybe upconvert the frequencies by about 15 ( making it 300 to 3 Khz) and then divide it down the other end ? Or is there an easier solution ?
This way it will remain ( almost!) real time !
Thanks.

Edit: Maybe amplitude modulate a 2 Khz signal with the LF and then filter out the 2Khz at the other end ?
 
Last edited:
I was figuring out how to send low frequencies signals real time over Whatsapp. Say 20 to 200 Hz. The mic circuit probably only carries 300 to 5000 Hz. So maybe upconvert the frequencies by about 15 ( making it 300 to 3 Khz) and then divide it down the other end ? Or is there an easier solution ?
This way it will remain ( almost!) real time !
Thanks.

Edit: Maybe amplitude modulate a 2 Khz signal with the LF and then filter out the 2Khz at the other end ?

You could modulate one channel and use the other as a clock to synchronously demodulate, a simple search will offer several simple circuits.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.