Rick R
Veteran
The H4n cannot record a secondary/safety audio track.. at least not w/o splitting the mic to multiple channels. The Tascam DR-40 can.. however.. I would not advise using either as a 'single' all-in-one microphone/recorder, as least for dialog. In addition, the stock pre-amps in all the under $500 devices are not exactly.. 'stellar'.. .