On Wed, 2016-09-14 at 12:52 +0000, Michael Chapman wrote: > > > > I've been editing some old B-Format field recordings, one of which > > was > > made > > in a very humid climate where there were issues with the > > mic (ST250); > > such > > that two channels dropped out completely for some the session. > > > > That almost sounds as if you have two (of four) A channels. That is > straight outputs from two capsules of the mic. > If so then direct feed (e.g. A1->-L and A2->-R ) s probably the > best > you can do. > If the recording was made through the original ST250 Control Unit, and not with some kind of custom-made preamps directly from the microphone, then the signals have in any case already been processed by the Control Unit. Either to WXYZ, to stereo or to M/S. The Control Unit has no level metering, so there is no visual cue about the integrity of the A channels.
I could imagine one of the following scenarios: 1. Some capsules or the connection from the mic to the CU partially failed, but the others were still matrixed into WXYZ. B-Format would be heavily corrupted, but still with some signal on all 4 B-Format channels I suppose. 2. Connection between Control Unit and Recorder partially failed. Only some of WXYZ would be recorded on the respective tracks. Crackle, noise or silence on the others. Easily to identify. 3. The Switch "B" on the control unit was disengaged by accident during the recording. In this case Left/Mid would appear in normal and inversed polarity on the W and X recorder tracks, Right/Side non- inversed and inversed on Y and Z respectively. This happens because the Control Unit has only two male XLRS for output. In case of B-Format recording custom cabling is used, retrieving 4 unbalanced signals from the two connectors. Julian _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
