applied-acoustics-systems ultra analog Manual Do Utilizador
48
Audio and Midi Settings
6.3
Audio Control Panel
To launch the audio configuration panel, choose Audio Control Panel under Preferences of the
Edit menu on Windows or the Ultra Analog menu on Mac OS systems.
Edit menu on Windows or the Ultra Analog menu on Mac OS systems.
This panel allows you to select the bit depth sample rate (22.05, 44.1, 48, or 96 kHz) and buffer
size, which affects how quickly the Ultra Analog responds to the control information it receives.
The smaller the buffer size, the shorter the latency, and vice versa. Note that the content of the
dialog depends on the driver selected in the Audio Settings menu.
The smaller the buffer size, the shorter the latency, and vice versa. Note that the content of the
dialog depends on the driver selected in the Audio Settings menu.
Some sound cards provide their own ASIO control panel, in which case the above information
will differ from card to card. Some sound cards also require that you close all programs before
making changes to the buffer size, sampling rate. If you discover this is the case with your sound
card, please refer to the manufacturer’s documentation for details on configuring it for optimum
performance. Most sound card manufacturers also update their drivers regularly. It is strongly
recommended that you visit your sound card manufacturer’s website regularly to ensure you are
using the most up to date drivers and support software.
making changes to the buffer size, sampling rate. If you discover this is the case with your sound
card, please refer to the manufacturer’s documentation for details on configuring it for optimum
performance. Most sound card manufacturers also update their drivers regularly. It is strongly
recommended that you visit your sound card manufacturer’s website regularly to ensure you are
using the most up to date drivers and support software.
6.4
Latency Settings
The latency is the time delay between the moment you send a control signal to your computer (for
example when you hit a key on your MIDI keyboard) and the moment when you hear the effect.
Roughly, the total latency is due to two factors: 1) the time taken by the sound card driver to send
MIDI signals to the Ultra Analog and 2) the time taken by the sound card driver to send back the
sound samples to the card for playback.
example when you hit a key on your MIDI keyboard) and the moment when you hear the effect.
Roughly, the total latency is due to two factors: 1) the time taken by the sound card driver to send
MIDI signals to the Ultra Analog and 2) the time taken by the sound card driver to send back the
sound samples to the card for playback.
To control the amount of latency introduced by the Ultra Analog.
• Launch the Audio Control Panel.
• Adjust the buffer size.
• Choose the sampling frequency and the audio format (16, 24, 32 bits).
• The total latency is equal to the number of samples per buffer divided by the sampling rate.
It is of course desirable to have as little latency as possible. The Ultra Analog will however
require a certain latency to be able to calculate sound samples in a continuous manner. This time
depends on the power of your computer, the preset played, the sampling rate and the number of
voices of polyphony used. Note that it will literally take twice as much CPU power to process
audio at a sampling rate of 96 kHz as it would to process the same data at 48 kHz, simply because
you need to calculate twice as many samples in the same amount of time.
depends on the power of your computer, the preset played, the sampling rate and the number of
voices of polyphony used. Note that it will literally take twice as much CPU power to process
audio at a sampling rate of 96 kHz as it would to process the same data at 48 kHz, simply because
you need to calculate twice as many samples in the same amount of time.
In order to optimize the resources allocated to the calculation of audio by Ultra Analog, it is
possible to decrease the ratio of resources affected to the calculation of graphics for the interface
in favor of audio related calculations. To adjust this ratio, choose the General command under
Preferences in the Edit menu on Windows or Ultra Analog menu on Mac OS and adjust the Per-
formance slider to the desired value between better audio performances and smoother graphics.
in favor of audio related calculations. To adjust this ratio, choose the General command under
Preferences in the Edit menu on Windows or Ultra Analog menu on Mac OS and adjust the Per-
formance slider to the desired value between better audio performances and smoother graphics.