It's VideoPad 10.24. The transfer is made with a conversion lead into a USB port. The input devices are video: EM28284 USB video device and audio: Line (EM28284 USB audio). The transfer equipment and device drivers are Video-2-PC from www.video-2-pc.co.uk.
There's no EM28284 device when I open Volume Mixer from the speaker icon but there is, and I get the sound while recording, if I do the following:
Open Sound Settings/Related Settings/Sound Control Panel/Recording tab/Line/Properties/Listen tab/Check 'Listen to this device'
Thanks for pointing me in the right direction.