Syntek Sound Cards & Media Devices Driver


STK2570 is a high integration 2-Channel Digital Video Recorder and Digital Still Camera controller. The STK2570 features high quality image processor coupled with high-speed bus and video compression engine delivering excellent quality video recording and playback (720p size 1280x720 at 30 fps). Innovative image processing architecture reduces memory size requirements in both DVR and DSC mode allowing operation with single 8MB SDRAM (4x16 PC166) Sensor interface module accepts 10 bit data delivered by modern CMOS CCD sensors preserving details in shadows and delivering perfect images even for high dynamic range scenes. Syntek proprietary auto white balance and auto exposure algorithms utilize the statistical data analysis to deliver the precise and pleasing colors. Integrated microphone amplifier, AGC and audio codec reduce system component count and deliver clear audio recordings at all sound levels. The STK2570 is also capable of storing MJPEG videos and JPEG compressed pictures on most popular non-volatile/volatile memory or mini-storage cards. Storage interface utilizing fast DMA allows direct recording to the storage media and supports all major industry standards. Other auxiliary features such as TFT LCD and OLED panel interface, TV display, audio annotation, recording and playback, programmable user interface logic and power management are all integrated into a single chip.

  1. Syntek Sound Cards & Media Devices Drivers
  2. Syntek Sound Cards & Media Devices Driver

The package provides the installation files for C-Media USB Audio Device Driver version If the driver is already installed on your system, updating (overwrite-installing) may fix various issues, add new functions, or just upgrade to the available version. Syntek USB 2.0 Video Capture Controller Driver v., v., v. Windows XP, Windows Vista, Windows 7, Windows 8. PC Pitstop - PC Performance Roots. PC Pitstop began in 1999 with an emphasis on computer diagnostics and maintenance. During the early days of the dot com boom, our online PC maintenance tools were skyrocketing. A sound card (also known as an audio card) is a computer expansion card that facilitates the input and output of audio signals to and from a computer under control of computer programs. Typical uses of sound cards include providing the audio component for multimedia applications such as music composition, editing video or audio, presentation, education, and entertainment (games).

  • 2-channel HD Camera
  • Support 10 Mega pixels at capture mode, 10-bit data
  • Support 1280x720 (720p) (Front) and 720x480 (Rear) M-JPEG AVI video at 30fps
  • Seamless interface with most CMOS and CCD Image Sensor, 10-bit data width
  • Support multiple-windowed auto focus (AF), auto white balance (AWB) and auto exposure (AE)
  • Built-in Face Detection Engine
  • Built-in microphone amlifier and audio codec
  • Memory Sub-System:
    - SDRAM: up to 64MB, 16 bit external bus, 4 banks for reduced page break latency
    - Support for degraded SDRAM
    - ROM/NOR Flash interface up to 16MB
    - Serial Flash support (SPI interface, 2 and 4-bit fast read, DMA)
    - High capacity NAND Flash (SLC and MLC), SmartMedia Card (SM)
    - Secure Digital (SD)
    - Multimedia Memory Card 4.0 (incl. 8-bit)
  • Fully USB 2.0 High Speed Phy built in
  • Supports all major TFT LCD (incl. AU, Topoly) and OLED panels with flexible digital interface (8, 16 bit)
  • Built in TV encoder (NTSC/PAL) and DAC
  • 40 GPIOs for user interface and system control
  • Touch panel controller, analog interface
  • Battery-low voltage detector (8 levels/10 bits)
  • Real Time Clock
  • 176-pin LQFP
  • Guide to capture VHS video with the LogiLink Video Grabber,
    EZgrabber, EasyGrabber, STK1160, STK1150, ezcap168.
    Using proper software.
    Which codec to use.

    A suggestion first

    The quality of the video obtained can depend significantly on the quality of the video recorder on which the video is played.
    Possible sources of error include: Interferences in the tape run with picture dropouts, dirt on the video or sound heads and fluctuations in the playback speed, which affext the line length and frame rate.

    If you want to exclude these sources of error and want a high quality transfer (VHS ––> raw file), you should contact a professional video service provider.
    They now offer quite inexpensive transfers. It is crucial that a video recorder with time base correction (TBC) is used. This device ensures that all lines in a frame are stretched to the same length and lie exactly below each other.

    Line flutter is an error that can hardly be corrected afterwards. The author of these lines has tried a lot himself, and has not found a method with which the correct placement of lines can be found afterwards.

    However, the further processing of the video obtained usually makes sense in any case.
    See Filltering VHS video (Virtualdub) and VHS filtern (Avisynth). (German version only).

    Connecting the USB Video Grabber (status 2010)

    The Grabber has two different video inputs (composite and S-Video). If your VHS player has an S-video output, you should definitely use this. The picture becomes sharper (see test).

    Compposite video transfers both luma and chroma in a mixed signal. Composite video is connected to the yellow plug.
    All VHS players provide a composite signal via their SCART connector. If necessary, you need a SCART adapter, then connect your RCA cable to the grabber.

    Right and left audio input is connected to the red and white cable. You should better use a separate cable for audio then using a combined video-audio cable. If you use a combined video-audio cable the video signal might crosstalk into the audio path.

    It is importand to connect the grabber to the right USB connector of your PC. This is the first reason where some people fail with the USB video Grabber.
    You have to ensure that there are no other USB devices attached to the same extended USB controller that is used for this connector! This also applies for the mouse. If your PC has multiple USB ports, alwasy some of them are connected to the same controller.

    The safest option is buying a USB 2.0 expansion card which is very cheap. Install that card in your PC. Then you can be sure that the grabber does not share bandwidth with other USB devices.

    It goes without saying that the USB port at least must fullfill USB 2.0 standards. USB 1 is much too slow for video.
    Problems with USB speed cause dropped frames.

    USB 2.0 controller in Device Manager

    You can check your USB devices via Computer > Hardware > Device Manager. Above you see a screenshot from a German windows system. You see, all of the built-in USB ports are running from the same Enhanced Host Controller
    Therefore, I have connected the grabber to a separate USB 2.0 card. This is shown here as 'VIA USB enhanced Host controller' which appears at the bottom.


    The workflow presented here works under Windows XP. New Windows versions use a different driver modell. There were problemes reported with Windows 7.
    Logilink Grabber VG0001 with Windows 7 driver does not work (but works under WinXP).

    Using the right software for grabbing

    This topic addresses the second problem, where many people fail. For digitizing video, you need a fast PC and you also need fast software.
    The decisive factor is the processor load that you create. With more than 90% processor load you most likely will get dropped frames.

    The included software Ulead VideoStudio SE requires a lot of computing power. On my PC I always had timing errors in the captured video, when using VideoStudio SE.

    Video-grabbing software, advantages and disadvantages

    Processor load (Prozessorlast) of different video capture software

    Here are my recommendations:

    Debut Video Capture Software (4 Stars), website
    Free trial period, then buyable
    all installed codecs available

    WinAVI Video Capture (3 Stars), website
    very low CPU load, the fastest program in the test
    generates either compressed MPG with AC3 sound which can be burnt to a standard DVD or an Avi container with any of the codecs that are installed at your system
    Error: saving as AVI using the PICVideo3 codec did not work (no video data in the file)
    can not save uncompressed audio, which is bad
    the program has to run with administrator priveleges because it wants to change the INI file in the program directory.
    The generated MPG files had GOP timing errors in B frame 89996 at 59:59 and some more errors (system time in I-frames and GOP Time and Temporal Sequence in B frames, inspected with GSpot)

    Ulead Videostudio 10 SE (2006) (1 Star)
    generates high CPU load, which is leading to dropped frames
    allows free choice between its own MPG encoder (AC-3 sound only) or all installed codecs
    On very fast PC error-free grabbing is possible with this software.

    Corel VideoStudio X2 (2008)
    USB audio input can not be selected

    Video DVD maker free 3.30 (2007)
    works, but saves only to C:
    stores audio only with 22 kHz
    slow (Xvid produces 95 ... 100% processor load, MJPEG even 100%)
    PIC video used as Direct Show 'PIC VfW video' produced 74% processor load

    Windows Movie Maker 2.1 (XP)
    Records only to WMF files and offers no video capture size that matches the resolution of the grabber.
    Therefore the recorded files contain no video data.

    VLC Videolan
    (haven't tested yet)
    Media > Open Capture Device; then select SyntekSTK1160
    View > [x] Advanced Controls; activates an additional interface with a red Record Button

    You start the recording by pressing the Record Button. The video recording is stored without compression with about 60 GB/h.

    Virtualdub (not suitable for grabbing)
    I have not managed to capture with Virtualdub's integrated capture module. I had sacks of dropped frames and large audio offset.
    On the Internet I found the comment that Virtualdub probably only works correctly with some special Grabber chips.
    Also others have reported that grabbing with Virtualdub only was possible with 288 lines. The better quality of VHS and the video grabber require to use 576 lines, since you can only off-line deinterlace the full number of lines.

    Note: I tested on a PC with Pentium 4 (single core) with 3 GHz and 1 GB of RAM running Windows XP (SP3).

    Addendum 2019

    further developed version of VirturalDub, available as x86 and x64 version
    allows grabbing of videos and it is needed for further processing of the videos anyway
    the grabber module was revised and should work now
    (Since I don't grab videos anymore, I couldn't measure the performance)

    By now, current PCs should be fast enough to capture the video stream accurately, but the storage medium can still be a bottleneck:

    Remark from Michael (2017):
    Funny story... (you'll laugh)... I've been using Virtualdub to capture my VHS tapes... with EVERY try, I'd lose frames or frames would be inserted. So, I finally upgraded all my drivers on my Windows 7 64-bit OS. I defragged my SSD. I tried using different ports for my capture device... I've been pulling my hair out, right?!?!
    Well, what finally cured my problems was buying a portable HDD 4TB 3.0 USB. I start capturing my .avi file to THAT drive and guess what...YUP, no dropped frames whatsoever.

    Using correct software settings to grab VHS

    Syntek Sound Cards & Media Devices Drivers

    To achieve good image quality of resulting material, it is essential to apply a 2-pass process.
    In the first pass you record the video with low compression or losless (large hard drive required, about 10...40 GB per hour).

    After that post-deinterlacing is mandatory. After deinterlacing you can reduce the video resolution and save the video with smaller file sizes.

    VHS-frames have a native number of 576 lines, which is transmitted in two fields (frames), each consiting of 288 lines. If the recorded image is compressed with a video codec which compresses too much, a clean separation of the two frames may not be possible, because the image gets smeared.

    Therefore, you always should capture with minimum compression (MJPEG) or losless and with a resolution of 720 × 576. This results in about 10...40 GB of data per 60 minutes of film.

    Settings of the grabber driver

    These settings for the USB Video grabber you mostly find in the 'Options' of the recording software.
    Debut Video Capture: File > Options > Webcam > Device Settings

    Settings of the Grabber in Debut Video Capture are found under: File > Options

    Syntek Sound Cards & Media Devices Driver

    In Debut software the Grabbber is not addressed as a video capture device, but as a webcam.
    Choose here the highest resolution 720 × 576th
    For other settings of STK1150 click on the button 'Device Settings'.

    STK1150 Device Settings > Video Processing (color saturation, brightness, contrast)

    Here you can leave everything to the default values. At very pale videos you can raise color saturation to 300 … 400. However, I recommend to adjust desired color saturation during post processing in Virtualdub.

    STK1150 Device Settings for the video standard and the desired video input (Composite)

    In Germany Video must be set to PAL / BDGHI with a frame rate of 25 fps (for NTSC 30 fps).

    You can access these settings in WinAVI Video Capture with the button 'Option'. There you find a 'Devices' tab.

    Using a proper video codec

    1. The codec should work as fast as possible because it has to back up the data in real time.
    2. Since videos are mostly interlaced, there is a danger that details between the lines will get blurred with compressing codecs, resulting in interferences between fields that become visible as artifacts after deinterlacing. Therefore a losless codec would be optimal - if it can work fast enough.
    Syntek Sound Cards & Media Devices Driver

    PicVideoCodec, (MJPEG) (3 stars) Website
    This codec stores the video as single images that are compressed using a method similar to JPG
    picture quality is very high
    at Q = 18 small blocks in frames are slightly visible, needs about 9 GB / hr
    at Q = 19 adequate quality
    at Q = 20 needs about 18 GB / h
    Settings: 4:2:2 Subsampling (with 1.1.1 color gets to much resolution assigned, with 4.1.1 color gets to blurry)
    activate 'Encode normalized YUV' (this does not change the levels, it only sets a APP1 marker in each frame telling the PICvideo Decoder that for this frame any automatic level conversion is forbidden)
    some people say the PICVideo codec scales the color space wrong. I cannot confirm this.
    Note: Some other MJPEG decoders automaticly convert the grey levels from TV levels (16...234) to PC levels (0...255), even when the frames have already PC levels. This results in a picture that is to black in dark zones and to white in bright zones (build-in decoder in Virtualdub and AVIDEMUX 2.4 do so)

    X264lossless (3 stars ★★★)
    lossless compressed frames
    best quality, small file sizes (13 GB/h)
    needs fast CPU (check CPU load)

    Pure uncompressed frame data
    best quality, but needs huge space
    necessarily requires a very fast hard drive

    Other codecs (MPG, XVid, DivX, X.264)
    All other codecs are often too slow. The PC must compress the data in real time.
    WinAVI and Ulead Video Studio bring their own, relatively fast MPG encoder.
    I will advise against using MPG, because it produces block artifacts, which can cause problems in post-processing when it comes to deinterlacing, lines cannot be separated cleanly.

    Addendum 2019

    More losless Codecs:

    • Lagarith (3 Stars ★★★) 35 MB /1h video, 50...90 fps, contained in VirtualDub2 – fast enough for real time compression
    • FFV1 18 MB/1h video, 15 fps with 8 bit, slower with higher bit depth – on my system too slow for real time compression, contained in VirtualDub2
    • HuffYUV 37 MB/1h video, 23 fps – on my system too slow for real time compression, contained in VirtualDub2
    • ffdshow VfW provides also MJPEG functionality and may replace the PIC video codec

    Audio codecs

    Standard DVD codecs are PCM, AC3 and MP2. We want to edit audio later. Thats why we use PCM at 44.1 kHz and 16 bit. If you want to create standard video DVDs you should record sound with 48 kHz sampling rate.

    Uncompressed sound, ideal choise if post-processing is required.
    As the standard sampling for DVD is 48 kHz, but in the PC world 44.1 kHz audio has established.
    Whenever possible, you should record PCM.

    Is an approved compressed format for DVD (MP3 is not allowed at DVD)
    a lossy compression method
    I don't use it because it can not be edited directly and there are problems when cutting.

    very common lossy format, saves space
    with 192 kbits the sound is perfectly adequate for VHS recordings (no loss of audio quality)
    not a good choice if audio must be processed or edited later
    not unfavorable when the film is to be cut again

    MP2 is also approved for PAL DVDs, but is rarely used
    from 192kB on MP2 sound is equivalent in quality to MP3.

    Settings of the codec

    Setting the video and audio codecs
    Debut Video Capture: Options > Webcam > Device Settings
    WinAVI Video Capture: Option > Devices

    Debut Video Capture
    Codec settings are accessed via the button Encoder options, which is at the bottom.

    Debut video settings for the codecs

    If possible, choose the settings shown in the picture. With the button Video compression settings you can select the codec (chose PICVideo codec, quality = 19).

    WinAVI Video Capture
    You select the codec with: Option > Encode > Encoder Setting.

    WinAVI AVI encoder settings for the PICVideo codec

    If you have installed the PICVideo MJPEG codec, you can select it by chosing AVI as output format. If possible, choose the settings shown in the picture. Does not work, video data is missing in the saved AVI file.

    In WinAVI Video Capture unfortunately AC-3 is preset as audio format. Choose the highest possible audio bitrate 224 kbs. Possibly you have to convert the AC-3 bit stream for post-processing audio into a PCM signal. (Software: BeSweet)

    WinAVI codec settings for MPG video

    If you do not have a lossless codec, you need to save your video as MPG. Select also the highest values for picture resolution and audio bitrate as shown in the screenshot. In Preference you can choose whether the codec should work faster with less quality. By speed (fast) results in some, hardly visible block artifacts in the MPG movie. Your choice should be such that your system load during grabbing will remain below 90%.

    Syntek Sound Cards & Media Devices driver

    Other software settings

    For saving choose an appropriate partition which has enough space.
    Ideally you will ues a second hard drive installed in your system that runs independently of the system partition.
    So you have better access times and faster data transfer rates.

    In my PC I have installed a second hard drive just for video (as a buffer for recording and also used as video archive).
    The system will park this drive automatically when it is not used. So it makes no additional noise during normal operation.

    Deactivate life-preview of the video image in your software, if possible. This saves a few percent of CPU usage during recording.
    Another way to reduce processor load is minimizing the preview window of that software during grabbing.

    Before you start

    System settings
    Stop all unnecessary processes. Especially anti-virus scanners should not be active, as enormous amounts of data are to be transmitted to harddisk.

    In the energy-saving options of your PC turn off the shutdown of disks.
    Disable the screen saver.

    Settings on the VHS player
    Do a test run with the VHS cassette. Adjust synchronization of the tape on the player to maximum image stability if necessary. Each frame that is not synchronized well can lead to an additional offset between video and audio stream in the recorded data.

    Some players have a HQ / Copy switch. This activates artificial color edge enhancement. However, it can produce a smoothing of colors so that faces look like beeing painted and fine details are lost. The setting 'Copy' provides a better image.

    Adjust image sharpness to a neutral position. It is better to sharpen the image during post-processing, because the hardware sharpening in the player is done with a simple high pass.

    Test run
    Do a test recording first. Minimize the program window of the digitizing software or disable the live preview during grabbing.
    Run the System Monitor to evaluate the CPU load. You should be all the time below 90%.

    Do not use the PC for other activities during grabbing!


    Connect the USB video grabber to a USB 2.0 connector that is running at a bus where no other USB devices are attached to the same Enhanced host controller
    use extra audio cable
    if possible use S-Video
    use a fast hard disk with sufficient free space (at least 50 GB)

    Do a test run with the VHS tape, adjust video synchronization to maximum image stability

    terminate all unnecessary processes
    use fast video recording software, which is able to use codecs that are installed at your system (eg Debut Video Capture)
    save as AVI using a codec with low-loss (eg PICVideo MJPEG codec with quality 18 or 19)
    save in the full resolution of 720 × 576
    minimize the program window of the digitizing software or disable the live preview during grabbing
    run the system monitor to estimate the CPU load (should be <90%)
    do not use the PC during grabbing

    > Post-processing the grabbed video with Virtualdub

    > Post-processing the grabbed video with Avisynth (German version only)

    I appreciate this site.

    source: wwww.engon.de/audio, 2.9.2010, 2019
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