Singscope is a mobile app that shows the pitch of your singing. It analyzes your singing voice, estimates its pitch values, and draws the pitches in a graph as a function of time. The pitches are shown in music scales (C, D, E, F, G, A, B). From the graph, you can check if your singing is stable and on pitch, and can also observe some vibrato characteristics of your singings.
This app is made for iPhone, iPad, and iPod touch, and requires iOS 6.0 or later. It is optimized for real-time* pitch graph display while you sing, for the newer generations of iPhones and iPads, including iPhone 5s and higher, all iPad Air / iPad Pro models, and iPad mini 2 and higher.
*On earlier generations of iOS devices, the graph display might be slower and delayed. At the end when the graph rendering is completed, you will still get the full pitch graph displayed. See Device Compatibility section later for details.
To use Singscope app, simply go to the Singscope View, tap on the Microphone button, and sing to your iPhone (or iPad/iPod). While you sing, watch your pitch graph being drawn in progress. Note that if Singscope does not respond to the voice, please make sure the Microphone is enabled for Singscope in the device's Settings > Privacy > Microphone.
Singscope is sensitive to ambient noise, so it performs better when you sing in a quiet place. Don't play instruments or music loudly in the backgound while you sing to Singscope. If you'd like to play music for your singing, use earphones or headphones.
When you are done with your singing, tap on the Microphone button again to stop recording (or simply keep quiet for a few seconds and wait for the recorder to stop by itself). Then, you can review the pitch graph by pan-and-zoom using typical touch gestures such as drag and pinch.
To hear the voice you recorded, tap on the Play button.
To clear the pitch graph and start a new one, tap on the New button.
Singscope also provide functions to review and save your recorded voices. For details, please see Singscope User Guide.
The pitch of your singing is drawn in the music scale as function of time. We call this drawing a pitch graph.
In the graph, each vertical grid line indicates a time mark in the unit of seconds. Each horizontal grid line indicates an exact semitone pitch frequency and is labeled by music name and octave number. For example, C4 means note C at 4th octave, which is corresponding to the middle C in piano keyboard. A4 is note A at 4th octave and has pitch frequency of 440 Hz.
Here are two sample pitch graphs of singing voices. You can see the moving of your pitch as you sing. You can also observe the vibrato of your singing in the graph.
This feature pack contains a set of sheet music for vocal warm-up and exercises. It adds the following functions to the app:
Besides the sheet music for vocal warm-up and exercises, we are currently working on a function for importing your own Lead Sheets. Please stay tuned.
For details about this feature pack, please check out its User Guide:
This app relies on CPU power for pitch estimation and graph rendering. For smooth real-time graph output, it is recommended to use 64-bit platforms (Apple A7 CPU or higher), including iPhone 5s, iPhone SE, iPhone 6/6 plus, iPhone 6s/6s plus, iPhone 7/7 plus, all iPad Air and iPad Pro models, iPad mini 2/3/4, and iPod touch 6. For the 32-bit platform with A6 CPU, such as iPhone 5/5c and iPad 4, the app still performs well without much noticeable delay.
On the devices with A5 CPU, such as iPhone 4s, iPad 2/3, iPad mini 1, and iPod touch 5, you might see some delay on real-time graph drawings. Although the drawing of pitch graph might be delayed, at the end when the graph rendering is completed, you still get the full pitch graph displayed.
If you'd like smoother real-time graph display on slower devices, you can lower the setting of Sample Rate (which reduces the voice recording quality), or Spectral Measure Rate (which reduces the pitch graph resolution). These adjustments can reduce the computation complexity and therefore get smoother pitch graph drawing.
To get to the settings page, tap on the Menu button and then choose the Settings item. The original setting for Sample Rate is 44100 Hz. The original setting for Spectral Measure rate is 100 Hz.
Singscope utilizes spectral analysis and pitch detection algorithm to estimate pitch from audio signals. The method has its limitations. The first limitation is the range of pitches. Singscope cannot recognize pitches that are too high or too low. The exact range depends on the timbre or characteristic of voice. The second limitation is related to the stability of input sound. Singscope cannot handle voices that are either too short or changing too fast. It may miss a short note. It may also have problems handling large-extent or high-rate vibrato (that is, pitch frequency swing too large or too fast in the vibrato voice).
Singscope cannot handle more than one singing voice or polyphony. Ambient background music sounds, instrument sounds, and additional singing voices could interfere with its pitch detection.
The performance of pitch detection algorithm could also be affected by personal characteristic or timbre of voice, the words in the singing, and some singing styles. For some types of voice, some harmonics or partials could be mistakenly identified as a pitch. Currently we continue collecting and analyzing more varieties of singing voices and improving the pitch detection performance. The improvement will come in the future app updates.
The terms of this app is Apple App Store's Licensed Application End-User License Agreement. That is part of the Terms and Conditions you agreed when you signed up with Apple iTunes & App Store.
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