Test types

• A/B: Test in which the test subject chooses one out of two samples played to him/her.
• A/B/X: Test in which the sample X is the same sample as A or B. Subject chooses which one sample X is.
• A/B/C: Test in which A is the reference sample and the subject chooses how much samples B and C (one of which is the same sample as A) resemble the reference sample A. (Actually this test is referred as a Ref/A/B-test).
• A/B Scale: An A/B test in which subject gives an answer for both samples on a scale specified by the test creator.
• A/B Scale, Fixed Reference: A test in which subject gives an answer how sample compares to a reference.
• A/B Scale, Hidden Reference: A test in which subject gives an answer for both samples on a scale specified by the test creator. One of the samples A or B is the hidden reference.
• Single Stimulus: A Test in which a single stimulus signal is played and then graded.
• TAFC (Two alternatives forced choice): Test in which two samples are played altering some parameter until the subject can no longer hear the difference between the samples.
• SSMS (Single Stimulus Mixed Source)

• Multiple answers: All tests can include additional questions. Questions (answers) can be choices and grades (configurable).
• Free or fixed sequence: The sample sequence can be fixed (freely configurable with multiple samples and pauses between samples) or free where the subject selects in which order samples are played.
• Time limit for answering: A timeout can be set to limit the time the subject has for giving the answers for a test item. Without a timeout the subject can have as much time as he needs to decide the answers. With a timeout, the test goes to the next item when the time ends.
• Parallel switching: Normally when the subject switches to another sample, the currently playing sample stops and the another starts from beginning. In parallel mode the switching to another sample is done by cross-fading to the other sample and does not just jump to the start to the beginning to the sample. Useful in test where long samples are compared. Parallel switching is only usable for free sequence tests.
• MCLL setting: The most comfortable listening level can be fixed by the tester or is set by the subject within the volume range defined by the tester.