Audio experts: what's the best way to pipe a pre-recorded message to a telephone conference call?

Put the speaker next to the receiver?

When you are on the conference call check if the unit or program you are using has an option to switch the input to a different source, i.e. an iPod with the message on it or this video played back, perhaps.

That’s what I’ve been doing, putting the speaker next to the phone, but the that greatly reduces the quality of the recording since people are listening to it on different quality phones all over the world. I was hoping for some sort of direct input. Maybe there’s some kind of adapter.

Thanks for your replies.

I have done this!!!! A phone connection has 2 leads for mono audio. If you splice a telephone jack cable with a 3.5mm mono audio cable, you can plug one end into the wall and one end into an iPod. I have tried this and it does work, just wait to plug the homemade cable into an extra jack until you want to use it, ie don’t leave it in all the time or even before you dial the phone.