When recording, depending on the sample rate used, the driver has been observed to up-sample the received audio, returning 2x or 4x as much data as an application expects, leading to distorted audio. The driver also attempts to correct recording issues (1.0.0.13b, Oct. The modifications to the 1.0.0.13 driver addresses these two issues. The speaker amplifier gain is scaled by -16 dB in software, while the headphone amplifier gain isn't.In the Windows XP driver, there are two causes of low audio volume: Windows Vista uses a different driver and has its own independent set of problems. 1, 2009)Īs per a thread on Apple Discussions ( Very Poor Volume Output - Windows XP), Apple/Cirrus Logic appears to have shipped incorrectly-configured drivers for the MacBook Pro's audio device in Windows XP. If 1.0.0.13b (96 kHz) doesn't work, try 48 kHz instead. The recording problem isn't completely fixed in neither version b nor c.Fixes recording issues for most sample rates in Windows XP (except 96 kHz).The 'No S/PDIF' variant turns off S/PDIF optical output.Removes the -16dB volume limit on the speakers, and applies it to the headphone output instead.Enables the third (midrange) speaker in the MacBook Pro.This driver is a modification of clhdaud.sys version 1.0.0.13: Manually choose to the driver from a list, and use the 'Have Disk.' button. Don't let Windows search for or do anything automatically. Installation of the modified driver follows standard procedure: In Device Manager, Update Driver for the Cirrus Logic High Definition Audio device. The 'No S/PDIF' version also turns off the S/PDIF optical output. Cirrus Logic High Definition Audio īoth versions enable the midrange speaker and corrects the volume.There are two variants of the driver included: New drivers are available from Cirrus Logic. Windows XP driver 1.0.0.32 is not fixed, while 1.0.0.38 appears to fix audio playback but not recording. This driver also works in 32-bit versions of Windows Vista and Windows 7, however there is a newer driver set where the Vista driver seems to be fixed. Unfortunately, their link is dead, so here's a copy: CS4207_WinVista_Win7_32-64-bit_6-.zip Windows Vista and newer: Cirrus has a new driver that should work.Cirrus Logic has a newer XP driver version 1.0.0.38 (Jan., 2011) that is reported to fix audio output problems, but still not record properly.Try this if recording still fails with 1.0.0.13b, but it probably won't help. CirrusAudioXP_Macbook_c.zip 1.0.0.13c (Nov.CirrusAudioXP_Macbook_b.zip 1.0.0.13b (Oct.

Macbook pro microphone jack