AppAdvice has once again teamed up with Mathieu Brassard in order to offer you a chance to win one of nine (9) promo codes for Discover Musical Instruments for iPad, iPhone, and iPod touch ($.99).

Let your children get an early start on learning, and have a fun time doing it. Discover Musical Instruments is designed to introduce kids as young as a few months to elementary years to anything from whistles and pianos to pan flutes and harpsichords.

Discover Musical Instruments contains 36 different musical instruments, all in a nice and neat alphabetical order, with both English and French support. Each high-resolution photo includes a sound clip and the instrument’s name.

Tap on the photo to hear an electric guitar’s riff, a bagpipe salute, a harp’s soothing melodies, and more. Tap on the name to hear a narrative pronunciation, in either native supported language. Use a swipe or arrows to navigate through the photo library. Portrait mode includes one-by-one, while landscape shows up to eight different instruments at once. Multi-touch support allows your child to make a symphony of various tones and music.

Discover Musical Instruments is currently being offered at an introductory price. If you’d liked to get an idea of what this app can do for your children, feel free to check out the trimmed down Discover Musical Instruments Free.

To have a chance at winning one of four Discover Musical Instruments promo codes, simply hit that blue tweet button near the bottom of this page or retweet this post from your favorite Twitter app before 11:59 PM PDT tonight (November 23rd). We will then search the Twitterverse for all of the retweets and randomly choose our lucky winners. The winners will be notified via Twitter, so please be sure to follow us so we can send you your promo code via a direct message.

Non-Twitter users and those of you who want to increase your odds of winning can simply leave a relevant comment below before 11:59 PM PDT tonight to have a chance at winning one of the other five Discover Musical Instruments promo codes.

Feel free to participate in the giveaway via either or both methods. Only one entry per person per method is allowed, totaling up to two entries per person if using both. This giveaway is only open to U.S. iTunes account users.