ipDTL Voice-Over Studio

Paul Berry - 'Voiceover Paul'


ipDTL for Radio Remotes

Capital FM, UK


ipDTL - HQ Audio for Voice Sessions

Guy Harris' studio - VoiceoverGuy, UK



Live radio contributions and voice sessions through your web browser

ISDN is Dead

For some years, ISDN has been the technology of choice for contributing to radio programmes. There are several reasons to look at alternative options…

  • Telecoms providers such as AT&T and BT are expected to withdraw ISDN provision in the coming years.
  • New technology allows ISDN equivalent audio to be sent and received over the internet. You’re already paying for your broadband connection, so why continue to pay for an ISDN line too?
  • An ISDN line requires an expensive hardware ‘codec’ at your end. When ISDN is no more, this too becomes obsolete.
  • If you relocate your office or move home, an ISDN line can’t easily be migrated in the same way that a broadband connection can.


ipDTL provides better-than ISDN quality audio using just a computer running Chrome.  Just add a good quality microphone.  Pay once for 12 months unlimited use.

‘ipDTL Ready’ Radio Stations include…
NPR, BBC Radio 4, WABC, 2Day FM, CBC, LBC, BBC Radio 5 live, WNYC, BBC World Service, KROQ…and the list is rapidly growing.

Try it today!

ipdtl yeti mic with mac


A computer.

Audio ‎interface or USB microphone.
Good internet connection.


Install Chrome browser.

Get an account.
Follow the instructions.


Simple to setup.

Annual subscription.
No connection fees.


Wideband OPUS codec.

Peer to Peer. Low delay.
Automatic NAT traversal.


The subject of ISDN’s demise has been a hot topic for some time now, and finally we have the definitive answer.

SIP is the protocol which most office phones around the world use to talk to each other, and a version of that protocol has been adopted by the EBU as its standard method of interoperability between broadcast quality IP audio devices.

Now, sip.audio makes it easy to give each device its own SIP address (your.station@sip.audio), so that any studio can be called from anywhere in the world, just like with ISDN. OPUS is the audio codec which makes this dream a reality, as it’s now being widely adopted by device manufacturers such as Comrex, Tieline etc.

You can even use sip.audio on your smartphone, with an app such as LUCILIVE or Linphone.