Sennheiser 418MS

[arno]

I use a Sennheiser 418 MS mic. I use FCP and want to decode the MS signal. in the timeline. But how?

Arno

 

[BRH]

What do you mean, "decode" ? If you ended up with 2 tracks in FCP, I'm assuming that would be your 418 in MS stereo. If you just want the mid mic, pan the 2 tracks dead center and the side mic will dissapear.

 

[Oleg 2]

that not what he asked about .
dont know if the fcp has decoder but you can invert one of the chanel in phase and crate another trac -
the sum of the inverted and the other chanel would be the right , the sum of the the 2 tracks would be the left

 

[SMuir]

I'm not sure exactly how you'll go about decoding M-S matrixed stereo to X-Y stereo in FCP, but here's the procedure I've used in Adobe Premiere and other editing packages. It takes three tracks, each with a copy of your matrixed audio, and should work just fine in FCP. I'm going to assume that your M-S tracks follow the convention of L=M R=S.

1st track: "take left" to discard the right channel, and centre-pan the resulting M signal.

2nd track: "take right" to discard the left channel, and pan the resulting S signal hard-left.

3rd track: "take right" to discard the left channel, pan the resulting S signal hard-right, and invert the phase (ie. using an effects plugin).

If possible, link the fader levels on the 2nd and 3rd tracks. Adjusting the relative level between track 1 and tracks 2/3 will allow you to fine-tune the stereo width. Bouncing the three tracks down to a single streo track before you start cutting the footage may simplify the editorial proccess, although most editors prefer to non-destructively mute the S signal and cut using the mono M signal, leaving the M-S decoding and fine-tuning for the sound editor.

This sort of opperation is far easier in Protools than in FCP, even without dedicated M-S decode plugins.

 

[SMuir]

What do you mean, "decode" ? If you ended up with 2 tracks in FCP, I'm assuming that would be your 418 in MS stereo. If you just want the mid mic, pan the 2 tracks dead center and the side mic will dissapear.

If a stereo track contains matrixed M-S stereo material, centre-panning the two tracks will not give you a mid-only mono signal. It will actually give you the left-side of an M-S pair decoded to X-Y (ie. M+S).

To achieve the effect you described, the matrixed stereo recording would have had to have already been decoded to X-Y stereo.

 

[arno]

I'm not sure exactly how you'll go about decoding M-S matrixed stereo to X-Y stereo in FCP, but here's the procedure I've used in Adobe Premiere and other editing packages. It takes three tracks, each with a copy of your matrixed audio, and should work just fine in FCP. I'm going to assume that your M-S tracks follow the convention of L=M R=S.

1st track: "take left" to discard the right channel, and centre-pan the resulting M signal.

2nd track: "take right" to discard the left channel, and pan the resulting S signal hard-left.

3rd track: "take right" to discard the left channel, pan the resulting S signal hard-right, and invert the phase (ie. using an effects plugin).

If possible, link the fader levels on the 2nd and 3rd tracks. Adjusting the relative level between track 1 and tracks 2/3 will allow you to fine-tune the stereo width. Bouncing the three tracks down to a single streo track before you start cutting the footage may simplify the editorial proccess, although most editors prefer to non-destructively mute the S signal and cut using the mono M signal, leaving the M-S decoding and fine-tuning for the sound editor.

This sort of opperation is far easier in Protools than in FCP, even without dedicated M-S decode plugins.

Thanks! I will try it. But whe're can I find phase effects plug in?

Arno

 

[SMuir]

whe're can I find phase effects plug in?

I'm not really certain. It may not even be an effects plugin... look around for "invert" or "invert phase", or perhaps "reverse phase."

You may well have to either acquire an MS decoder plugin, or else decode the audio in another program.