Flowchart describing the process of working with the online recorder to build a ModelTalker voice.

This flowchart shows the main steps they you will follow in creating your ModelTalker voice. The blue boxes on the left are the things you will be doing while the orange boxes on the right are the things we need to do. You are in the Setup & Training step right now. Once you have completed that process, you will record 10 screening sentences. The screening recordings will be reviewed by our lab staff. We check your recordings mainly for two things: the audio quality; and your speaking style. Don’t be surprised (or dismayed) if we ask you to redo the screening sentences a time or two. Voice banking is a lot of work for you so this process is all about helping you to make the most of that effort and achieve the best outcome.

Once approved for recording, you can proceed at your own pace to complete the 1600 sentences we recommend. That’s roughly one hour of running speech at a normal speaking rate, but it will take you much longer than one hour to do the recording, probably 6 to 8 hours if you are able to speak fluently and don’t make many mistakes. If your speech is somewhat affected by ALS/MND you should probably break the recording up into many short recording sessions, once a day at the same time when your speech is strongest. We do not actively monitor your recording while you are doing this so you will also need to listen frequently to your recordings to make sure the audio continues to sound just like it did when you started. If you have any concerns, you should contact us.

On completing the standard inventory, you will have an opportunity to provide custom recording material. A web form will allow you to enter lists of person, place, or object names and a list of custom sentences or phrases to record. Recordings of these phrases are stored in the synthesis database in a manner that guarantees they will be rendered verbatim should your voice be asked to “synthesize” the exact phrase. Each of the person/place/object names is embedded in multiple brief sentence frames for recording.

When you complete the custom recording (or if you decide not to do any custom recordings), the website will notify our lab staff who will process your recordings to construct six versions of your synthetic voice. These versions differ in the way your recordings are processed to form the voice.

As a newly installed feature, all six versions of your voice will be installed on the web server for you to audition. You will be able to select options for synthesis (speaking rate, intonation control enabled, timing control enabled), and to compare all six voices with each other in a structured listening task. See our explanation of this in the audition description. The result of this is selection of a final voice version and synthesis parameter settings that are used to create voice installers for you.


Web browser: The web recording tool only works with the Chrome web browser (you cannot use it in Safari or Internet Explorer and recent versions of Firefox have been very troublesome). You will need to install Chrome if you have not already done so.

Microphone: Unless you are a professional working with professional equipment, we require the use of a wired, head-mounted microphone with a USB interface. There are three important advantages to using a USB headset:

  1. The headset will maintain a constant distance and orientation between your mouth and the microphone. This is extremely important for consistency from one recording to the next.
  2. Many computers, especially laptops, have less-than-optimal sound cards. A USB mic will have its own built-in sound processing hardware that will bypass the sound system of your computer.
  3. A headset mic is less likely to pick up ambient noise.

Several consumer-grade USB headsets will be acceptable, but do not go for the least expensive headsets because their audio quality will not be good enough. Based on current prices in the US, expect to spend around $40 – $50 USD for a basic good quality headset. The Sennheiser PC 36 is a model with which users have had success. The Jabra UC Voice 550 Duo is another option that has recently been used successfully. Users have had mixed success with Logitech and Plantronics headsets, but if you already have one of these you should try it with our software before buying a new headset.

Do not bother to try recording with a desktop microphone or (even worse) your computer’s built-in microphone; it will not be possible to obtain acceptable recordings. If you have professional-grade audio equipment that you would like to use for recording, please contact us to discuss the best way to use the hardware.

Recording location: You should choose a room in which you can minimize all sources of background noise. If there are other people in the house while you record, make sure you can’t hear them talking or the television in another room. Close the windows to avoid noises from outside. Make sure any phones or other devices are on silent. Watch out for and eliminate less obvious sources of background noise, like fans, forced-air heat, air conditioners, or other appliances.

Also, the room you are recording in may be shielded from outside noise, but the room itself can cause the sound of your voice to reverberate off of hard surfaces and create echo in your recordings. Rooms with vaulted ceilings, hardwood, tile, or marble floors should be avoided. A small room with carpet and curtains is preferable. If you have a walk-in closet, that may be ideal.

If you are stuck with a reverberant room, it may help to place blankets on the floor when recording in order to absorb some of the sound. If you have a room divider screen, setting that up in a U or semi circle shape so that you are facing the inside of the U and draping blankets over the screen to further improve sound damping can help a lot. In the worst case, a trick that radio professionals sometimes use in unfavorable recording environments is to drape a blanket or quilt around the person with the microphone to help damp out other sounds and echoes.

Once you are set up with your computer in your recording location and using Chrome, go ahead and connect your USB microphone and click Continue. We will start by measuring the background sound level in your room (i.e. the silence) to be sure the environment is going to be acceptable for speech recording.