YAC is a walkie-talkie app for macOS – nice idea! You are probably working on a public release? (I see there's a waitlist now)
Probably no point to even ask how you communicate in your remote team. I guess you're using your own app :)
Definitely using Yac! We've got a public release, it's just invite only ;)
If you're struggling to connect with your team over timezones and schedules definitely give Yac a try. You can request an invite on the site and ping me here and I can bump you up the list!