We recommend using a cable headset, as the voice audio quality of Bluetooth headsets is subject to large fluctuations - depending on the combination of headset and device and the respective codecs.
In theory, most Android 8.0 and higher devices support Bluetooth codecs with a sufficiently high sampling rate and sampling depth. In practice, however, not every headset device combination selects the best codec for a Bluetooth connection. The resulting loss of data can lead to the fact that the voice audio quality is not sufficient for smatrix.
Therefore, test whether your individual combination of Bluetooth headset and smartphone/tablet is sufficient for smatrix. We have had good experiences with the combination of the 'Sennheiser MB Pro 1' headset and 'Samsung Galaxy S9'.
smatrix has no influence on the GPS localisation/location detection of your device or third-party software. It is not possible to navigate to individual test plots using GPS, as the accuracy is not sufficient to do so.
smatrix Android allows you to determine your current location using GPS localisation and store it in the 'Location' info field.
ATTENTION: A deleted trial cannot be restored. Make sure that important data has been exported and stored elsewhere before deleting!
Additional information or meta data may be added in the 'Trial Info' section. Click on 'Add Info Field' to choose info fields from the catalog or create new, customized ones. After adding the required info field to you trial, data may be entered into them.
The standard info field 'Location' will use your device's GPS location. The two standard info fields 'Time' and 'Date' will access your device's clock and calender.
ATTENTION: Trial info fields will not be exported as CSV, since that would mess up the CSV format. If info field data are required, please export as XLSX or PDF file.
The order of traits and hierarchy levels may be edited in the 'Edit trial' menu. Simply use the double-arrow button on the left side of the screen to drag a trait or a hierarchy level upwards or downwards to the desired position.
ATTENTION: If you change the order of the hierarchy levels, the structure of the trial also changes (e.g. from 10 plots with 5 plants each to 5 plants with 10 plots each).
Yes, with the voice command "Correction <new value>" the last entered value is replaced by the <new value> (e.g. "Correction 50" replaces the last entered value with 50).
If you use the voice command "Correction" without a new value, the cell where you last entered a value is selected. This value is not deleted but can be overwritten by entering a new value.
Alternatively, you can navigate to a cell directly (e.g. with the voice command "Back"/"Previous", by clicking the cell or by stating the trial unit and trait, e.g. "Plot 10, downy mildew") and then enter the new value.
Yes, when "Prompts" are activated ("Prompts on"), smatrix will read out the trial unit and the trait of the selected cell each time you move cells (by automatic progress, click or direct voice command).
In addition, you can make smatrix read out the trial unit and the trait of the currently selected cell at any time using the voice command "Where am I?" / "Current position".
Even if several microphones are connected to one device, smatrix only accepts the input of one microphone. This can be selected in the settings menu under 'Audio' > 'Voice input'.
If two users are to use a single instance of smatrix while completing an assessment, the best solution is for only person A to wear a headset connected to smatrix. Person A enters their own data by voice. Person B calls out their data to Person A, who repeats Person B's data into the microphone to enter it into smatrix. This takes a certain amount of discipline and it means person A has to speak a lot, so we recommend that each person completing an assessment uses their own instance of smatrix.
This can have various causes: