Ok, this seems a bug!
Please try this fix:
- open ieds.pas unit
- in method TIEDirectShow.StdConnect replace the line…
fBuilder.RenderStream(@PIN_CATEGORY_CAPTURE, @MEDIATYPE_Audio, fCurAudioInput, fCurAudioCodec, ppf);
..with…
fBuilder.RenderStream(@PIN_CATEGORY_CAPTURE, @MEDIATYPE_Audio, fCurAudioInput, fCurAudioCodec, multiplex);