BBC Proms/Royal albert hall

I don't think you'll find broadcasts better than this...all the way down to 20Hz and below! The broadcast for this proms (on BBC4) has an audio rate of 256kbps mp2, twice that of DAB (blearch). I think the lowest note on an organ is 16Hz, though it's hard to measure freq's that low reliably but I think the recording engineers included them:)