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Small improvements to howto

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Sebastian Kiesel 2023-07-30 19:09:06 +02:00
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doc/howto.md
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@ -84,7 +84,7 @@ presentation and you will find files ```0000.png```, ```0001.png```,
### Create "presenter view" PNG files ### Create "presenter view" PNG files
Go to the directory with the screenshot PNG files from the previous Go to the directory with the screenshot PNG files from the previous step
and start ```muxsa-pv```. and start ```muxsa-pv```.
It will create a subdirectory ```presenter-view``` and create a files with It will create a subdirectory ```presenter-view``` and create a files with
@ -181,31 +181,31 @@ The next settings depend on your voice and your preferences, but you may
use these as a starting point for your own experiments. At the Motu M2 use these as a starting point for your own experiments. At the Motu M2
interface set interface set
* at the "IN 1L" side, where the microphone is plugged in * at the "IN 1L" side, where the microphone is plugged in
* GAIN to about "3 o'clock" position * GAIN to about "3 o'clock position"
* Phantom power off (the red "48V" LED does not light up) * Phantom power off (the red "48V" LED does not light up)
* Direct monitoring on (the blue "MON" LED is lit) * Direct monitoring on (the blue "MON" LED is lit)
* at the "IN 2R" side, where no microphone is connected to * at the "IN 2R" side, where no microphone is connected to
* GAIN to minimum, i.e., about "7 o'clock" position * GAIN to minimum, i.e., about "7 o'clock position"
* Phantom power off (the red "48V" LED does not light up) * Phantom power off (the red "48V" LED does not light up)
* Direct monitoring off (the blue "MON" LED does not light up) * Direct monitoring off (the blue "MON" LED does not light up)
* Monitor to minimum, i.e., big knob to about "7 o'clock" position * Monitor to minimum, i.e., big knob to about "7 o'clock position"
* Headphone volume (small knob at the very right) to about "3 o'clock" position * Headphone volume (small knob at the very right) to about "3 o'clock position"
Adjust the boom arm such that the tip of the microphone points at a 45 Adjust the boom arm such that the tip of the microphone points from the side
degree angle to one corner of your mouth and that the microphone is very at a 45 degree angle to one corner of your mouth and that the microphone is
close to your mouth, about 50 mm (2 inches) away from your face. very close to your mouth, about 50 mm (2 inches) away from your face.
Avoid talking straight at a 0 degree angle into the microphone, as the wind Avoid talking straight at a 0 degree angle into the microphone, as the wind
gusts caused when you speak so-called plosives (i.e., words with the letter gusts caused when you speak so-called plosives (i.e., words with the letter
"p" etc.) may cause unpleasant sounds in the recording. Use your headphones "p" etc.) may cause unpleasant sounds in the recording. Use your headphones
with the direct monitoring feature while you are speaking to identify such with the direct monitoring feature while you are speaking to identify such
unpleasant sounds. unpleasant sounds and learn how to avoid them.
In Audacity, hit the record button and speak some test sentences. In Audacity, hit the record button and speak some test sentences.
Hit stop when you are done. Hit the play button to listen to your Hit stop when you are done. Hit the play button to listen to your
recording. While listening to the recording and in particular while recording. While listening to the recording and in particular while
editing the recording (see below), it is wise to turn off the direct editing the recording (see below), it is wise to turn off the direct
monitoring feature (blue button on the Motu M2), to make sure that monitoring feature (blue-lit "MON" button on the Motu M2), to make sure that
any sound picked up by the microphone (e.g., keyboard klicks) any sound picked up by the microphone (e.g., keyboard klicks)
at that time is not mixed with the playback. at that time is not mixed with the playback.
@ -276,20 +276,20 @@ youtube. The author uses these Audacity (version 2.4.2) effects in that
specific order; you can use that as a starting point for your own specific order; you can use that as a starting point for your own
experiments: experiments:
1. Noise Reduction #### 1. Noise Reduction
Record some seconds and try to be as silent as possible. Mark this part of Record some seconds and try to be as silent as possible. Mark this part of
the recording, click Effect / Noise Reduction / Step 1 / Get Noise Profile. the recording, click Effect / Noise Reduction / Step 1 / Get Noise Profile.
Then mark the whole track (Ctrl+A), and click Effect / Noise Reduction / Then mark the whole track (Ctrl+A), and click Effect / Noise Reduction /
Step 2 / OK. Step 2 / OK.
2. High-Pass filter #### 2. High-Pass filter
Mark the whole track (Ctrl+A), and click Effect / Plugin 1 to 15 / High Pass Mark the whole track (Ctrl+A), and click Effect / Plugin 1 to 15 / High Pass
Filter. Set "Frequency (Hz)" to "80" and "Roll-off (dB per octave)" to Filter. Set "Frequency (Hz)" to "80" and "Roll-off (dB per octave)" to
"6 dB", click OK. "6 dB", click OK.
3. Compressor #### 3. Compressor
Mark the whole track (Ctrl+A), and click Effect / Compressor. Set Mark the whole track (Ctrl+A), and click Effect / Compressor. Set
* Threshold: -12 dB * Threshold: -12 dB
@ -355,7 +355,7 @@ concat multiplexer control file by using:
user@linux:~$ muxsa-al2fc LabelTrack.txt > slides.concat user@linux:~$ muxsa-al2fc LabelTrack.txt > slides.concat
Assume that the PNG files created above, the ```soundtrack.m4a``` Assuming that the PNG files created above, the ```soundtrack.m4a```
and the ```slides.concat``` file are all in the current directory, and the ```slides.concat``` file are all in the current directory,
use use