SoundStepper Icon


A software for ATM telescope automation

5.0 Stars (1)
7 Downloads (This Week)
Last Update:
Download SoundStepper V5.4.0.299 (binaries, supp…
Browse All Files



SoundStepper is a "100% software" telescope controller, for Windows, using audio hardware to control step motors at real time. All it requires to operate are external step motor drives, which can be a commercial "pulse/direction" drive or analog current amplifiers.

SoundStepper Web Site


Robotics, Astronomy


Public Domain


  • Controls up to 4 motors (RA, Dec, focuser and field derotator) of a equatorial or alt-azimuth-mounted telescope
  • Controls any type of equatorial-mounted telescopes with step motors. Manual-pointing mounts (ex: barndoor, poncet platforms, "polar axis", threaded-rod driven mounts), "meridian-flip" mounts (ex: GEM or cross-axis), and "no-meridian-flip" mounts (ex: Fork, yoke, horseshoe, split-ring), and beginning from 5.0 beta version, alt-azimuth mounts too
  • Can "sync" and "go-to" manual-pointing mounts, making faint objects easier to find (manually center scope on a star, find the star in Cartes du Ciel, right-button, "sync", right-button on faint object, "go-to")
  • Using analog control, SoundStepper drive step motors with quietness, smoothness and linearity. With adjustable linearity, the typical wobbling is 1/20 of step. Like microstep controllers, it can put the motors in any position between step positions
  • In addition to the analog control option, SoundStepper is also capable to control commercial "pulse/direction" microstepping drivers
  • No PICs, no micro soldering on small SMDs, no EPROMs. SoundStepper uses cheap USB-AUDIO devices to drive steppers, through a simple (SUGGESTED) analog current controller, or standard "pulse/direction" drivers
  • No MS-DOS dedicated computers. SoundStepper does realtime control sharing the computer with planetarium, photo/video capture and others applications, in Windows. It take advantage of the audio devices buffering and autonomous playing
  • Built-in PEC and NPEC (periodic and non-periodic error correction systems). With NPEC, the entire threaded rod can be "trained", enabling the use of cheap thread rods, and the "thread rod/nut/arm" system (like "Astrotrac")
  • Main screen with keyboard arrows "control box" (four speeds: slew, find, center and guiding), go-to, flip, park/unpark, and focuser/rotator controls
  • Permit save many defined positions of focuser, according eyepiece, camera, barlow and filter being used
  • LX200 command interface compatibility, enabling the interoperability with Meade-compatible software, through virtual serial-TCP redirector. The TCP/IP interface enable control the scope from a remote computer
  • Configuration screen with many controls, to match SoundStepper with your motors and mount
  • Autosave and autorecover last telescope and motor positions (crash recover)
  • Joystick interface: You can control the telescope with a standard joystick, wired or wireless.
  • Field derotation for alt-azimuth mounts
  • Backlash compensation
  • Portable: You can run SoundStepper from any external HD or Pen-drive. No installation procedure is required
  • Certified from Windows XP to Windows 10, including Vista, 7 and 8.1 versions, both 32 and 64-bit
  • Native ASCOM driver for Telescope and Focuser


Other Useful Business Software

VoIP Monitoring without the Missing Links Icon

With global offices, wireless networks, and data traversing the Internet, troubleshooting VoIP performance is tricky.

VoIP Monitoring without the Missing Links Icon
ThousandEyes extends visibility across corporate networks as well as the public Internet, helping to solve issues from the branch through MPLS links and SIP trunks to service provider networks. Simulate pre-deployment capacity, monitor detailed performance metrics and see how QoS settings impact call quality.

User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 0 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 0 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 0 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 0 / 5
Write a Review

User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    I know my own opinion can't be neutral, but I have to write it here: it really works, is cheap, and easy to assembly. Thank to it, I'm rid of parallel/serial ports and MSDOS for the equivalent of US$25 per motor. And I didn't have to weld PICs nor burn EPROMs. And the software is free, open source and public domain. No more I lose 30 minutes or more trying to find a 16th magnitude comet or asteroid in the sky! Using latest version of Soundstepper, even with my "threaded rod/arm" mount, now I can do "sync" in a nearby star, and "go-to" for an object that would be almost impossible to find otherwise.

    Posted 09/22/2010
Read more reviews

Additional Project Details

Thanks for helping keep SourceForge clean.

Screenshot instructions:
Red Hat Linux   Ubuntu

Click URL instructions:
Right-click on ad, choose "Copy Link", then paste here →
(This may not be possible with some types of ads)

More information about our ad policies

Briefly describe the problem (required):

Upload screenshot of ad (required):
Select a file, or drag & drop file here.

Please provide the ad click URL, if possible:

Get latest updates about Open Source Projects, Conferences and News.

Sign up for the SourceForge newsletter:

JavaScript is required for this form.

No, thanks