thank you for your fast reply, using the 32bit ProgDVB solved the problem.

(i take it the codecs i wanted were not 64-bit)

ProgDVB standard x64 v6.84.03 engine 5.148
OS: win7 x64
DVB-T/T2 card TBS6220
Country: UK
Demultiplexor: Prog
Audio Renderers: Prog

ProgDVB works normally with DVB-T channels

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when i switch to view a DVB-T2 ...