I am presently troublehooting a weird problem I have with Wavelab since version 7. I have done some new tests to nail it down.
(See below post the details of my configuration )
When I record a 24 bit signal though my configuration , the resulting soundfile is officially 24 bit, sound quality is fine BUT : when reading the file and watching the bitmeter only the top 16 bits light up, the last 8 bits have been truncated.
I have tried sequentially in many different orders to record (Win XP) in wavelab 6, 7 and 8
The result is always the same, everything ok, full 24 bits in the file recorded with Wavelab 6. Allways 8 bits missing in wavelab 7 in 24-48k, most of the time the same in 44,1kHz. I thought that maybe the driver malfunctioned but how is it then that I record ok in W6 ?
I installed a clean Windows 7 to use wavelab 8.5, and it is the same problem. Again the driver is showing no signs of malfunction apart from this truncating thing
I have to say that once I tried changing settings from temporary file recording to specific and back, changing resolutions etc, and things started working again, but the next day it started again truncating the last 8 bits, and I have never been able to reproduce this.
ASIO TEST : If I use the ASIO driver, the problem disappears, I get all 24 bits in my files. But this makes my life a living hell as I keep switching in the course of my work from 441 to 48 and back. This forces me to manually switch the clock reference to avoid glitches or files that don’t play in the right speed. It makes my workflow very insecure.
OK, so before I throw the whole system and invest in a new Soundcard System I want to make sure that this is not some configuration bug or hidden option somewhere. Any idea as to a test procedure I could use to further narrow down this problem is welcome !
Thanks for any light on the subject
- - - CONFIGURATION- - -
PC with XP (Wavelab 6 - 8) and W7 (Wavelab 8.5)
Sound Card : RME DIGI96/8 PAD (http://www.rme-audio.de/old/english/digi96/digi96pa.htm) : Although this PCI card it is technically legacy hardware, the card and the drivers (32 bit only) are very stable and trustworthy, as is usually the case with RME
Wavelab I/O config : directly through MME-WDM drivers, NOT Asio as this links input and output clocks, which in my case makes my life impossible since I keep switching very often between 44,1 and 48k in input and output.
Record Configuration : Through the AES/EBU input of the DIGI96/8 PAD, the digital output of my HD 96 I/O form Pro Tools HD rig in real time. Sampling frequency can be 44,1 or 48kHz, almost never 96k
The soundcard when in XLR (aes) locks its input to the incoming stream, and has a safety that prompts a error message in Wavelab if I try to record in 441k when the input in 48k. Very convenient and SAFE
Record Settings : temporary file, 24 bit 44,1k or 24 bit 48k
RME PAD96/8 Soundcard specifications
Supported sample frequencies: 32 kHz, 44.1 kHz, 48 kHz, 64 kHz, 88.2 kHz, 96 kHz
All settings changeable in realtime, all output options even in playback mode
Separate record- and playback circuits; complete master mode
Enhanced Full Duplex: Different sample rates at input and output possible
Mixed Mode: ADAT® in - SPDIF out and vice versa at full synchronization
AutoSync: Automatic and intelligent master/slave clock control
Unsurpassed Bitclock PLL (audio synchronization) in ADAT® mode
Optional Word Clock Module (WCM) provides word clock input and output
TMS (Track Marker Support): Supports CD/DAT start-IDs and the read out of CD subcode
Comes with DIGICheck: the ultimate measurement, analysis and test tool
Unique status windows for record and playback, showing mode and sample rate
Zero Latency Monitoring: Hardware bypass per track, controlled by Punch-in/out
AutoSelect searches automatically for an input with valid signal
Combined Channel Interleave/Multi Device driver compatible to almost all recording programs
Windows driver with Pentium® optimization (quad times memory transfer)
High bus transfer rate (up to 130 MByte/s)
Digital inputs and outputs ground-free transformer coupled
Super low jitter design: < 1 ns in PLL mode (44.1 kHz, optical in)
32 bit memory transfer and 128 kB fast SRAM guarantee very low system loadAnalog input +4 dBu/-10 dBV configurable
Superior analog 24 bit/96 kHz input. Dynamic range 109 dBA
Flexible superior analog 24 bit/96 kHz monitor output. Dynamic range 112 dBA
Low impedance output (75 ohm) ready for headphones, stepless output level through software faders
Speaker Protection minimizes noise during power on/off
Analog output routable to ADAT® tracks
Digital I/O: optical (TOSLINK), coaxial (phono), internal (CD-ROM/Sync-I/O). Optional breakout cable (not included in standard version) provides AES XLR connection.
Formats SPDIF-AES/EBU (Consumer, Professional), ADAT®