Hi Tom.
Glad u asked!
The buzz is the sound card in my cheap laptop, that picks up internal interference, especially when the fan runs.
It's not too bad behind voice, and most times I muted my Skype when not talking - but sometimes I forgot!
Not ideal, but that was all that was available at short notice.
I agree the whole format seems a little bit long/boring perhaps - perhaps needs more short music bursts, and more different voices. (nudge, nudge, all
)