Adjusting the signal

The other day I was driving and I noticed a change in my behavior. On my way to a regular destination, I chose to go a different route. Not really longer, just different. Turns out my reasoning was to avoid a hole in the 3G coverage that I noticed awhile back. I have become seriously attached to my Radio Paradise sessions in the car and I don't want to miss anything, even while running errands. My mental routing engine knows that and plans accordingly.

Internet radio in the car has now become part of my subconscious pattern. Radio has become visceral again, part of my life. I like that.

A funny thing happened on the way to Cupertino...

Arrived in San Jose and got the standard rental car from Thrifty. This time an exciting Seabring... be still my heart! Anyway, as with the other rentals I have had this month, this one had a AUX jack, so it was "Internet radio ready." I plugged in my iPhone running Tuner2 and headed out.

Driving around the South Bay, I tested 101, 85, 280, Lawrence Expressway, and Montague Expressway. The experience was flawless, with two surprising exceptions. First, it dropped out briefly around 85 at El Camino, center of the commute path for folks heading to Google, MSFT, and the other companies in Mountain View.  

The second, however, was even more odd. Heading down 280 south at DeAnza, the radio dropped from 3G to Edge to nothing. Those in the know will recognize the location as being right outside Apple HQ in Cupertino! A friend suggested that the failure was due to heavy usage within Apple. That may be the case, but it is pretty odd. Area in La Jolla near Qualcomm HQ must have at least as much usage, but I haven't experienced failure around there yet. 

It appears that Apple and AT&T need a little more cooperation. 

Even with the dropouts, though, I must say that they were brief and definitely provided an experience as least as good as satellite radio.

Cruising to Palm Springs

A brief post for a brief trip. Went out to Palm Springs last weekend. Tuner2 App on iPhone worked great. As usual, signal died at the top of the 241 toll road. Also had brief signal trouble on California Hwy 60 going through the hills outside of Moreno Valley. Overall, though, it was smooth sailing. On a two hour trip, the interruptions accumulated to at most 5 minutes of silence. If only AT&T would get on the job and fix those holes!

For those who find these signal gaps a reason to dismiss the readiness of Internet radio in the car, I offer the following advice. Next time you listen to FM radio, listen carefully. You will soon hear dropouts in those same rural regions where your mobile signal fades. KPCC is the only reason I listen to broadcast radio in LA. As soon as I enter those same hilly areas where I lost signal on my iPhone, the FM signal gets fuzzy and sometimes even drops off. It would be interesting to have a sponsored study where someone drives around and records audio quality and reliability of an FM signal compared to the audio quality of that same station delivered over Internet. I am thinking that they won't be so different on the reliability front and the audio quality front will be heavily in favor of the Internet station.

Celebration in Chicago

On Monday, the new Tuner2 iPhone app finally showed up on the app store. Very nice! Modulation Index has done a great job putting it together with a focus on high-fidelity, reliability, and ease of use.

The day found me in Chicago driving a rented Ford Focus. Although not equipped with Sync, this one did have the requisite power plug (the politically correct term for a cigarette lighter receptacle present in every vehicle on the planet) and 1/8" aux jack (present now in most modern vehicles.) Driving around Chicago-land, I was streaming 24Kbps and even 64Kbps radio stations on Tuner2 without a hitch. Sweet!

Another city tested positive for Internet radio in the car.

More motion in the Mojave.

Another month, another trip to Las Vegas. This time to NAB. The best news is that the Tuner2 app for iPhone is now complete, so I got to test the release version across the desert. Being my third time this year (CES, CTIA, and now NAB), I have been able to compare the relative performance of Internet radio on my iPhone across the Mojave desert. Interestingly, each time has been better.

There is still a gap for about 40 miles after Ft. Irwin towards Baker on I-15. However, outside of that gap, it is 3G streaming all the way! I was able to tune into Radio Paradise up the Cajon Pass without a hitch. Starting south of Baker (well before the famous Zzyzx Road), I was able to jam all the way to Las Vegas with only minor breaks a couple times in the deepest parts of the desert. It appears that AT&T is constantly improving their network.

One caveat, (and maybe a minor bit of bragging), you won't get this kind of performance from just any Internet radio app on iPhone. You need one that has a persistent retry mechanism and one that has a high-quality MPEG-4 aacPlus decoder. With those two features, a 24Kbps stream sounds great through your speakers and rides through the bandwidth sags without audible rebuffering. Most of the iPhone apps that claim support for aacPlus (aka HE AAC, AAC+, etc.) use the open source FAAD2 decoder. That decoder has very poor performance and sounds terrible at low bit rates. (Personally, I don't think it even sounds that good at 64Kbps.) Since the Tuner2 iPhone app uses the commercial FhG decoder and the Modulation Index reconnect scheme, the audio quality and reliability are very high.

With all this talk about the desert, I don't want to forget to mention that the app still performs like a champ all around the LA metro area, delivering an experience superior to either satellite or HD Radio. Now that aacPlus is finally starting to show up in iPhone apps, car listening reliability will pass through the critical threshold for a broad audience. Pandora and AOL Radio still use 64Kbps MP3 on the go, so their audio quality in the car is marginal both on the decode and on the bandwidth usage. Once stations start to use 32Kbps MPEG-4 aacPlus, Internet radio in the car will really start to come into its own.

IP Dead Zone: San Joaquin Valley

Another week, another chance to test 3G Internet radio outside of the metros. This time, I motored north and south on California's main artery, I-5. Given my experience in the Mojave, I was optimistic about the Central Valley. It is more heavily used and shoots like an arrow through flat farmland surrounded by hills and peaks. I thought that this corridor is worth at least the same level of 3G infrastructure investment as I-95 on the east coast.

I was wrong.

I expected spotty connectivity going through the Angeles National Forest beyond Santa Clarita. What I did not expect is that things got even worse past Grapevine.

After you get down into the Valley, the next three hours are pure IP hell, just enough tease to fill the buffer then go dark as soon as you start to enjoy the song. AT&T, Sprint, it didn't matter, both networks had very poor coverage. Someone suggested switching my iPhone to EDGE-only to keep swapping at a minimum, but that didn't help. So I hiccuped my way, teeth on edge, up what certainly feels like the fastest stretch of freeway in the USA.

Turning west at Los Banos, connectivity returned at Gilroy and performed beautifully for the remainder of my time all across the Bay Area.

The moral of the story: Internet radio in the car is ready for prime time in the metros, but not in the rural areas.

Driving to Vegas with Radio Paradise

We are just about finished with our new iPhone app for Tuner2. (More on that interesting tidbit in a later post.) It performs flawlessly around the LA basin where AT&T 3G coverage is good. The question is, though, how would it perform in the middle of the Mojave? Since I had to head to CES anyway, I got the chance to find out.

Last year going to NAB 2008, I created a baseline for myself using the Sprint phone. Its performance was pretty spotty once you left the metro. The Tuner2 app on iPhone was a completely different story. I won't say it was flawless, but I was able to listen to Radio Paradise (24Kbps aacPlus) with only 1 or 2 hiccups going up the Cajon pass and all the way out to Fort Irwin/Yermo and the agriculture checkpoint.

After that, I had to take a break to make some phone calls. Similar to the Sprint experience, the iPhone was pretty spotty once I returned, but picked up again at Baker and was solid once more when I came into view of the Nevada state line. Driving around Las Vegas to and from the show, it was just as solid as "normal" broadcast radio. (Broadcast radio, BTW, crackles more than you think if you pay attention to it.)

It is interesting to note that the performance of the Tuner2 iPhone app is inverted from Sirius XM satellite radio receivers. In the urban areas, the scatter creates dead zones for sat radio (especially for Sirius, which seems to have a weaker ground repeater network.) I was in a rental car near Washington DC recently and the sat radio in the car went silent as I waited for the light to change under an overpass. In the desert, the lack of obstructions gives you good sat radio reception. For 3G (AT&T and Sprint alike) the urban areas are well covered and things get spotty when you head out into the desert or rural areas.

Of course, in the end there is no comparison since we spend most of our time driving in the metros and more importantly, the variety of what you can get via the Internet far eclipses the programming on satellite radio.