User manual ASIO ASIO4ALL V2

[. . . ] How this button is labeled depends on your particular software. Once you press this button, the ASIO4ALL control panel should appear. Please consult the manual of your audio software for further assistance, if necessary!Sometimes, the audio software indeed would not provide an ASIO control panel option. [. . . ] By expanding the device list, you can now fully explore the WDM audio architecture of your system. The device list contains Devices, Device Interfaces and so called "Pins" (this is Microsoft(r) lingo). The figure above illustrates how they interrelate in the WDM KS hierarchy. Using the "Action"-button, you can now selectively enable/disable each particular item in the device list. This way, you can also create multi-device-setups. Multi-device-setups require that all the devices involved are running from the same clock source. You can achieve this by daisy-chaining devices via S/PDIF etc. Fortunately, most USB devices will automatically syncronize themselves for as long as the host controllers they are connected to have a common clock source, which is trivially true for the USB host controllers embedded in the south bridge on any mainboard. Note: If devices are not accurately synced, their audio streams are likely to drift apart over time!On the right side of the panel are the advanced controls (1. . 5). Latency Compensation Since ASIO4ALL does not have sufficient knowledge of the underlying hardware/driver architecture, it can only guess the actual latencies involved. With these sliders you can compensate for the latencies unknown to ASIO4ALL such that recordings in your sequencer Software are properly aligned with the rest. Note: In multi-device-setups the largest respective value of all devices will be used. Therefore, if different devices have different inherent latencies, audio placement will not be accurate for some devices! 2. Hardware Buffer on/off Enables the hardware buffer for the highlighted device. This only works for so called "WavePCI" miniports, as other types of WDM drivers do not usually allow direct access to the hardware buffer. Adjustment for best hardware buffer performance involves the "ASIO Buffer Size" slider and the "Buffer Offset" slider (see below). Hardware buffering works best for rather small ASIO buffer sizes. Try something between 128 and 256 samples as a starter!The biggest advantage of using the hardware buffer is that this method uses a lot less CPU. In addition, it may be possible to decrease latencies even further. In multi-device-setups, it is possible to mix Hardware-buffered devices with devices that are not. [. . . ] Cubase SX 3 do not match the values that would result from the ASIO buffer size. ASIO4ALL supports the latency compensation features of ASIO hosts that perform latency compensation. This support is still a bit under development and will be improved as time passes. The values reported here are not just the latencies ASIO4LL adds to the audio stream, but rather the represent the whole shebang as far as driver/OS/hardware inherent latencies. [. . . ]