Any easy way to make audio sound like telephone?

unclebob6958 said:
2 - Use a plug-in like SpeakerPhone.

http://www.audioease.com/Pages/Speakerphone/speakerphone.html
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There's also Izotope Vinyl. It's free, and though it is actually made for emulating, well... vinyl... it can do a fairly convincing job of an old radio or a phone. Not quite as good as Speakerphone, but if $499 is way out of range, free is certainly affordable.

unclebob6958 said:
3 - Use High Pass & Low Pass filters, then start experimenting with the rest of the frequency bands until you are happy.
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I'd also suggest adding some light distortion (analog type), once you have your frequency response dialed in.
 
Get rid of everything apart from 300-3KHz for a start, then save it with a very low bit rate and reload to lower the quality even more. That will get you close, then tweak to make it worse still if you need to.
 
You can use everything from a plug in for pro tools or a yamaha spx has a pre set called on the phone to a guitar distortion pedal but what you basically need is narrow band as Paul says with a hint of distortion.

You can also do it by getting a small speaker or sounder and feeding the dialogue thru it and recording the results with a mic!
 
Kind of depends on what kind of phone your talking about. For that thin noisy "Hollywood" telephone sound Vinyl will do a pretty good job. For a more realistic and or modern cel phone sound SpeakerPhone is hard to beat. Filters and such will get to the limited bandwith of old landlines but wont add the noise and dirt.

Phones don't actually sound bad these days in a major market. They are sending everything digitally through optical cables so all the grit and hugely restricted bandwidth is really a bit anachronistic, but it sounds good.
 
Noiz2 said:
Phones don't actually sound bad these days in a major market. They are sending everything digitally through optical cables so all the grit and hugely restricted bandwidth is really a bit anachronistic, but it sounds good.
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I was talking to an engineer a few years ago about the digital transition and he said that for a while they were introducing some noise into the digital signal because without it people kept thinking they lost the connection at every pause in the conversation. Kinda funny that they made it too good and had to dial it back.
 
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