Maybe a rounding error?

The main transformer snippet of my code is

```
t pad = (1 - duration)
startpad = abs(pad * pad_offset) / 2
endpad = 1
tfm1.pitch(pitch_offset)
tfm1.tempo(tempo_offset, 's')
tfm1.pad(startpad, endpad)
tfm1.trim(0, 1)
tfm1.build_file('temp.wav', filename + '-av-' + str(x) + '.wav')
```

The main thing is the last tfm1.trim(0, 1) as the output from soxi -D

```
0.999938
pangram1029-av-17.wav
0.999938
pangram1029-av-18.wav
1.000000
pangram1029-av-19.wav
0.999938
pangram1029-av-1.wav
0.999938
pangram1029-av-20.wav
0.999938
pangram1029-av-2.wav
1.000000
```

Why does that final trim sometimes (not always) and how does soxi -D get a fraction of the sample rate 15999.008 samples = 0.999938 sec @ 16kSR ?

Start by reproducing the reported transformer snippet, especially the final tfm1.trim(0, 1), and inspect the generated WAV durations with soxi -D at the stated 16 kHz sample rate. Compare outputs that report 0.999938 with those that report 1.000000; done means identifying why the durations differ and documenting or correcting the resulting behavior.

Written by the indexing model from the issue text.