With all the recent free VoIP services available, like Babble.net, Skype, Sightspeed, and Jajah,
there are obviously a growing number of VoIP users, and thus an
increased interest call recording. In fact, it's a common question on
various VoIP forum websites.
Enterprise audio file storage issues aside,
there are some relatively simple methods to record VoIP calls. The
method to use does depend on whether your VoIP is hardware- or
software-based, as well as which service you're using. Some software
clients have recording built in; others require a plugin or even a
separate standalone program. For example, IPcelerate has a product
called IPstudio for recording VoIP calls, but it must be integrated into their IPsession platform. [via FierceVoIP]
Tom Keating of TMC has written frequently about recording VoIP calls, including using HotRecorder, and also provides links to forum discussions and other articles. HotRecorder
has a free trial for software that supposedly works with all VoIP soft
clients (according to Tom's article), and they push the podcasting,
online journalism, and business angles on their website.
I tried
out the free version of HotRecorder, and it's a compact little setup
that latches on to your Skype window. If you move the window around,
HotRecorder does too. I tried out a call to my father, who had never
heard of VoIP or Skype before yesterday, and who I've been trying to
get to install it. He hasn't yet, so I just used Skype's current free
PC-to-PSTN calling promo (in Canada and the US) and rang him up, just
after activating HotRecorder. [Apparently, this is wrong: activate
recording after establishing a VoIP connection.]
While
HotRecorder appears to work fine, my cheapo $1 mic might be causing my
voice to be "weak" and "unclear", according to my father. After saving
the conversation in HotRecorder, I played it back. The freebie version
has an annoying feature: one person's voice is on the left channel of
playback, and the other person is on the right. But other than that, it
worked like a charm.
Extrapolating my experience, if I had a
better microphone, real broadband access (instead of my cellular
Wi-Fi), and the inexpensive paid version of HotRecorder, this would
definitely be a tool I'd use for podcasts. So I went ahead and bought a
copy. (See below.)
Their website says HotRecorder works with
Skype, Google Talk, AIM, Net2Phone, Yahoo! Messenger, Firefly and other
VoIP apps. I'll have to try it out with Gizmo Project. (Sightspeed
already has audio and video recording capability builtin.) See Tom's
article or the HotRecorder website for more details.
The freebie
version has ads, and you cannot change the call quality or other
options. Recordings are also only 2 minutes max. But you can take
advantage of the goofy array of "emotisounds", including cheering
crowds, wolf whistles, and more.
All conversations are stored in their proprietary .ELP-format recordings. (Fans of Emerson, Lake and Palmer,
maybe?) There's a separate audio converter program, in beta, for
conversion to a variety of audio file formats, which are currently just
WAV, MP3 and the open standard OGG/ Vorbis.
You get this converter when you pay for a full version of Hotrecorder,
so freebie users are stuck with .ELP files, which appear to take up
half the space of MP3.
The features that I think will be the
most beneficial to podcasters who do a lot of VoIP interviews, and
anyone who does a lot of business calling, is the ability to tag
conversations with keywords and later search for them. (I wonder how
long it'll be before The Jerky Boys or someone else uses Skype and
HotRecorder to create a searchable crank-call podcast.)
Being
pumped about this tool, I actually just went and paid for a serial
number via Paypal. But after changing some of the options around and
trying to re-play the conversation with my father, I got an access
violation error message. Hmm. Will have to look into this.
An alternative to HotRecorder is Callcorder, although I don't know much about it. Other discussions about VoIP recording are available at the Vonage-Forum. And since HotRecorder does not currently work with Mac (or Unix), Ted Wallingford has an article at MacVoIP about a piece of recording software called Cain and Abel.
For enterprise solutions, there's CallRex Professional
from TelRex. Although at "as low as $259 per phone", it seems a bit
costly, but I could be mistaken. There's also the Unix-based PBXpress Call Recording VoIP PBX (which by the way supports e-911 through a backup PSTN connection).
For homegrown hardware-based methods, Chris Pirillo of Lockergnome suggests routing microphones and PC audio output
through channel mixers, and back into the PC. In fact, that's the way I
would have done it, until I came across software solutions. Chris also
links up to a similar VoIP recording article by Jake Luddington.