Software voice analysis

Let the computer analyze your voice, and get visual feedback on pitch, beat and loudness


Your computer must have an adequate microphone.

Scientific Approach

The scientific approach lets you assess your current standing - observe progress over time.

Macintosh or Windows

Choose Macintosh or Windows version.



AlgorithmsAndDatastructures is pleased to announce a product with which you can improve your well-being.

Singing is not only an important part for human beings, but also for other species. Singing expresses moods and feelings. Singing is a strong communication tool. By learning how to control your voice, you get more self confidence. To improve in any area, you need feedback.

Listening Singing Teacher at with its pitch recognition algorithm helps you to better control your voice in terms of pitch, rhythm and loudness. The collection of statistical data helps you to recognize trends: e. g. singing some notes always a little bit too high, or having the trend to sing eighth notes too short.

Listening Singing Teacher introduces The Red Pitch Dot: A red dot within the note that visually depicts the pitch position on the staff. The Counting Hints Line introduces a visual help to learn how to count rhythms.

AlgorithmsAndDatastructures is
pleased to announce our second product:

Listening Music Teacher at helps you to understand and get the feeling for our Western music system. The Western music system is based on natural overtones. The equal tempered scale was derived from the Just intonation system, which specifies ratios between the notes. Since overtones are everywhere in nature, we adopt the overtones and there preferred ratios in our perception. This assimilation lets us feel well when we hear sounds that behave according to those laws. Since we already have experienced such relations, we know we can rely on them. Things we know, we like, because we know what we can expect. Music builds upon these same algorithms to make us feel good.

Since ear training is an important part of music understanding, we introduce The Precision Listening Method. Our ear training method forces you to listen really carefully: after hearing two consecutive pitches, with a variable pause in between, you must indicate whether the second pitch was higher, lower or the same than the first pitch. Starting with the distance of a half step, in the first ear training exercise, the pitches to discern get closer with following ear training exercises.

Until you have to discriminate pitches that are only 12 cents apart. The last ear training session lets you differentiate pitches up to 1 cent. In this last exercise the distances are randomly chosen, and are no more in relation to the equal tempered scale. That is the starting pitch does not necessarily coincide with a pitch assigned to a note in the equal tempered scale. In addition, you have to keep the first pitch very close in your mind, since by moving the slider to the matching position, the pitch of the slider position will be sounded. Thus this sound will distract you from the first sound that you have to keep in mind.

  • The free included chord explorer introduces The Half-Step Brackets to visualize the relationship of the chord notes.
  • You can download a free trial of listening singing music for Windows or Macintosh by clicking on the downloads tab.
  • We hope you enjoy our second program and feel well by making progress.

is pleased to announce our third product:

Listening Ear Trainer at helps you to get absolute pitch. As the word absolute implies, there must be a relation to a man-made definition. The Western music system divides an octave into 12 half-steps. To claim absolute pitch in this system, you must be able to distinguish the pitches to 50 cents. A deviation of 50 cents corresponds to a quarter-step. Therefore if you can assign a sound with a precision of a quarter step, you can give that pitch a name that corresponds to a symbol on the staff.

  • Listening Ear Trainer introduces a systematic approach with the two methods The Singing Funnel Method and The Octave Anchor Pitches Method to track your progress towards the goal of getting absolute pitch.
  • You can download a free trial of listening ear trainer for Windows or Macintosh by clicking on the downloads tab.
  • We hope you enjoy our third program and feel well by making progress.

You find further information about our products at

AlgorithmsAndDatastructures is
pleased to announce our fourth product:

TuneCrack at helps you to understand the tuning process. TuneCrack stands for: Crack the tuning problem – Learn to tune instruments precisely. The importance of tuning is often underestimated. However, tuning is a necessary step for every performance. TuneCrack has exercises to improve your listening skill and your pitch transfer skill. Your listening skill is trained with the Precision Listening Method. Your task is to solve ever more challenging questions: until a precision to the cent. Your transfer skill is trained with the Pitch Keeper Method. First, the program introduces you to your personal Absolute Pitch Point. With appropriate exercises and feedback you learn how to take over a pitch and keep the sound for ever longer time periods. Transferring a pitch and keeping it in your mind is an important step in understanding the musical center of a piece. Since humans can only express pitch by singing, the program listens to you and gives you feedback based on your singing: a colored pitch line shows, if you are too low, too high or on target. The program tracks your progress and lets you see the statistics in graphical form. Thus, your weak and strong points get visible. Eliminate weak points by training and build upon and extend your strong points. With your strong points start building an absolute pitch repertoire.

is pleased to announce our fifth product:

Same Pitch Please at helps you to improve your pitch retention ability. Pitch retention is a special case of ear training. In most cases the training is done by growing melodies. That is you listen to a growing melody that you have to reproduce by singing it back (or on an instrument). This is a very efficient training and requires a lot of concentration. Usually this improves your relative pitch understanding. The program Same Pitch Please is aimed towards improving your absolute pitch ability. The Pitch Ability Method guides you through evaluation of your voice to that goal. The main difference between the growing melody method and the Pitch Ability method is that the latter method uses a growing period of silence. The pitch feedback lets you recognize when you start to deviate from the required pitch precision. As a result you get a handle to grasp your mechanism for storing and retrieving pitch from and to your long-term memory.

  • Same Pitch Please introduces the Pitch Ability Method. With this method your pitch retention ability gets systematically trained and you get an opportunity to scientifically measure your pitch ability.
  • You can download a free trial of listening ear trainer for Windows or Macintosh by clicking on the downloads tab.
  • We hope you enjoy our fifth program and feel well by making progress.

You find further information about our products at

AlgorithmsAndDatastructures is
pleased to announce our sixth product:

Pitch Ability Test at tries to demystify Absolute Pitch. One of the main features of Absolute Pitch is: Accurately sing a named pitch without a reference tone. The Pitch Ability Test gives gives people that aim for Absolute Pitch a handle, to improve on the road to Absolute Pitch. By picking out just one feature and introducing a graduaded test, the program gives you feedback on the pitch ability. The feedback lets you observe your progress. Keep in mind that progress doesn't come free. You may observe that at a certain point making progress gets difficult. This is the point where you should ask yourself: Is it worth do invest more effort to improve the pitch ability or should I concentrate on improving other abilities. There is no magic behind Perfect Pitch. You can never claim to be an Absolute Pitch possessor, if you don't pass that important feature: Accurately sing a named pitch without a reference tone. Unfortunately, this ability requires hard training. You don't learn a foreign language in a few month. To progress, persistant training and learning is a must.

Keep in mind that relative pitch is much more useful than absolute pitch. The Pitch Ability Test shows you where you are on the road to Absolute Pitch and gives you a hint on the effort it takes to improve.

The Pitch Ability Test tests these two basic music skills:

  1. Pitch take over
  2. Pitch retention


Thus the Pitch Ability Test is also useful for beginners.

  • The Pitch Ability Test is free.
  • You can download the Pitch Ability Test for Windows or Macintosh by clicking on the downloads tab.
  • We hope you enjoy our sixth program and feel well by making progress.

Listening Singing Teacher, Listening Music Teacher, Listening Ear Trainer, The Red Pitch Dot, The Counting Hints Line, The Half-Step Brackets, The Precision Listening Method, The Singing Funnel Method, The Octave Anchor Pitches Method,The Interval Overtone Method, The Pitch Keeper Method, Absolute Pitch Point, Same Pitch Please, Pitch Ability Method and Pitch Ability Test are trademarks of AlgorithmsAndDataStructures, F. Rudin. Macintosh and OS X are trademarks of Apple Computer Inc., IBM PC is trademark of International Business Machines Inc., Windows XP/Vista/7 is trademark of Microsoft Inc. All other company and product names are trademarks or registered trademarks of their respective owners.