# What went wrong today?

It must be something about Fridays? For the first half of today’s G14FTA lecture, when I was finishing off Section 3.1 introducing the extended real line, I had the following problems.

• My laptop was on battery power for most of that session, which resulted in the usual audio distortion and lack of synchronization in the recording. This was because I had yet again failed to flick the switch at the power socket. As usual, I only noticed this near the end of the recording when something unusual happened during one of my pen strokes. See if you can spot this in the recording!
• Somehow I managed to swap the Camtasia PiP video input setting from my external USB webcam to the laptop’s internal webcam. As a result, that webcam footage is not very useful, because most of the time it shows a portion of the ceiling, including a rather bright ceiling light. Also, it could be alarming to see my giant hand approaching the screen repeatedly. So I am going to discard the PiP video from that session.
• My Cursor Attention settings were also off, so that I had a pink/red spot instead of my usual red arrow when I wanted to point things out.

Hopefully I fixed all of these for the second half of the class. I’ll know soon!

### 2 responses to “What went wrong today?”

1. No, I still had the wrong video input for the next bit, Section 3.2 on arithmetic and series in $\null [0,\infty]$.
Oh well, at least I was on mains power and had my red arrow working (that is, until the show/hide toggle button for the red arrow stopped working properly …)
There is some background hiss on the audio. Presumably this is because I am using my webcam for the audio input rather than a higher quality microphone. I think the audio is clear enough, though.
Recordings will be available shortly.

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2. It is possible that the audio was recorded using the laptop’s internal microphone, rather than the webcam’s microphone!
Let’s see how much of this I can get right next time …

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