Small improvements to howto

doc/howto.md

@@ -84,7 +84,7 @@ presentation and you will find files ```0000.png```, ```0001.png```,
 
 ### 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```. 
 
 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
 interface set
 * 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)
     * Direct monitoring on (the blue "MON" LED is lit)
 * 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)
     * Direct monitoring off (the blue "MON" LED does not light up)
-* 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
+* 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"
 
-Adjust the boom arm such that the tip of the microphone points at a 45
-degree angle to one corner of your mouth and that the microphone is very
-close to your mouth, about 50 mm (2 inches) away from your face.
+Adjust the boom arm such that the tip of the microphone points from the side
+at a 45 degree angle to one corner of your mouth and that the microphone is
+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
 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
 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. 
 Hit stop when you are done.  Hit the play button to listen to your
 recording.  While listening to the recording and in particular while
 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) 
 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
 experiments:
 
-1. Noise Reduction
+#### 1. Noise Reduction
 
 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.
 Then mark the whole track (Ctrl+A), and click Effect / Noise Reduction /
 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
 Filter. Set "Frequency (Hz)" to "80" and "Roll-off (dB per octave)" to 
 "6 dB", click OK. 
 
-3. Compressor
+#### 3. Compressor
 
 Mark the whole track (Ctrl+A), and click Effect / Compressor. Set
 * Threshold: -12 dB
@@ -355,7 +355,7 @@ concat multiplexer control file by using:
 
     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,
 use