Recording a Radio Show on a Mobile Phone

myphone T23 Duo has a good sound recorder.

Finally, i have tried in full myphone T23 Duo’s sound recorder during my coverage with the business plan making seminar of the “Search for W.I.N.N.E.R.s” yesterday at the USC-SVD Study Mission Center.

All the voice recordings were used in yesterday’s episode of my radio show–“USC-Kapamilya Negosyo Na” over DyAB1512.

The result was amazing considering most cellphones have omni-directional microphone. Omni-directional microphones pick up sounds from all directions as its pick-up pattern.

Omni-Directional microphone picks up sounds from all directions.

Cardioid pick-up pattern is a heart-shape. The microphone picks up sound more at the front than its sides.

Image courtesy of Wikipedia: A cardioid generated by a rolling circle

The manual of the T23Duo doesn’t speak about its pick-up pattern characteristic whether it is omni-directional or cardioid which is widely-used in broadcasting. My suspicion, based on the way it picks up sounds during my recording, T23Duo has a cardioid microphone.

I have to convert first the AMR files into another format suitable for editing in my audio editing software.

Since the recording audio format was in compress and lossy format AMR, the recorded voices are a little dull. The Adaptive Multi-Rate (AMR) is common in GSM and UMTS mobile phones because of its speech format. But its sampling frequency is 8khz at 13-bit which is equivalent to the sound of a land line telephone–considered the lowest audio sampling quality.

Hence, i made a little audio enhancement on the recording using Adobe Audition to improve the quality. The tone is adjusted by lowering the low-band frequencies while increasing the mid-range and high frequencies using the graphic equalizer on my audio editing software.

The final result was amazing. It’s of broadcast quality. As if, i am using a professional voice recorder for my entire coverage of the event.


I was among the hurried buyers who crave for the discounted myIphone T23 Duo dual SIM and touchscreen phone on April Fool’s Day at SM City Cebu. Its one-day-sale price: P2,488– is a P911-slashed from its original price.

What is outstanding on this phone, aside from the fact that it’s a Dual-SIM and touchscreen even if it is lowly-priced, is its superb audio quality. Remember, in December 2010 i bought my first locally-branded mobile phone–the myIphone Q19i which i described as having a very nice audio for calls. Read my previous post here.

Continue reading this post…

My Phone is MyPhone!

I’m not calling it a habit but a once-a-year opportunity to buy new things during December which is driven by extra ordinary flow of cash. Thanks to the 13th month pay, cash gift,  bonus, etc.

In December 2009, i bought my first China Phone, the X1000. But unfortunately it did not reach its anniversary. See my previous post.

Now, i’m buying my first Filipino mobile brand, the MyPhone Q19i Duo. It’s a QWERTY Dual SIM phone. Both SIM cards are active–meaning you can use both SIM cards at the same time. It’s good enough to bring along with two mobile numbers on one phone these days.

Here’s the official specifications from MyPhone site:

MyPhone is unique and peculiar to us Filipinos because of its “Pinoy Contents” which is customized according to our culture and practices. “Pinoy Contents” includes prayers, history, trivia, and others. The “Pinoy Contents” can be downloaded from the MyPhone site. Copy the contents to your microSD card in a folder to be named “Pinoy” in order to use “Pinoy Contents”. You may also purchased directly from MyPhone dealers a 2GB or 4GB microSD card with Pinoy Contents at a price ranging P500+ to P800+.

MyPhone Q19i is priced at P1,880.00. Its low price make it more attractive for the masses. Hence, it has been a top selling phone these days at the CyberZone.