We have just taken delivery of some new work vans which stupidly do not have an analogue audio aux input which I rely on to play music from my old PMP (Rockbox'd Sansa Clip+). I have been using an FM transmitter the past few days but this evening was getting slight but irritating interference on the frequency I normally use. The new van radio does not let you manually scan the FM frequency range to find a better option so it is a case of suck it and see.
So my other options are a Bluetooth transmitter - I have one of those but I think it may be broken as it does not connect very easily if at all - Buying a new transmitter may be the answer there.
Or, switch to using a Rocker PMP I have to hand which has Bluetooth built in but the battery life does not last a whole working day and when running Rockbox on it loses Bluetooth support anyway.
Or, see if I can use the USB-C input on the van radio to play from my old PMP using a suitable adaptor if such a thing exists.
Or, play from my smartphone but again I lose the wonders and advantages of Rockbox doing that and having to wait for it to reconnect every time I get back in the van is a pain and I do not like leaving the phone in the van while unattended.
Am I on a fruitless search and should concentrate on the Bluetooth transmitter solution?