# NDSP plugins using external effects in the routing? **URL:** \ **Category:** Plugins\ **Created:** [April 10, 2025, 7:14pm UTC](https://unity.neuraldsp.com/t/ndsp-plugins-using-external-effects-in-the-routing/17842 "2025-04-10T19:14:27Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Zak](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/zak/32/5194_2.png) [@Zak](https://unity.neuraldsp.com/u/Zak)\ **Post date:** [April 10, 2025, 7:14pm UTC](https://unity.neuraldsp.com/t/ndsp-plugins-using-external-effects-in-the-routing/17842/1 "2025-04-10T19:14:27Z")
I need HELP with setting up my new **[ISP Hum Extractor + Decimator G](https://www.isptechnologies.com/guitar/hum_extractor_decimator_g_pedal)** guitar pedal with NDSP plugins. This ISP magic box is supposed to be the best guitar hum annihilator atm. The **HUM EXTRACTOR + DECIMATOR G** is two effects in one box, a HUM remover and a Noisegate. The Hum Extractor part removes the 50 and 60 hertz AC hum frequencies along with their harmonics reducing the requirement of the **DECIMATOR** single ended noise reduction to only have to work on gain noise and hiss. The **DECIMATOR** noisegate part is controlled from the direct instrument input allowing the noise reduction to work equally when switching between high gain and clean settings. I need to use the ISP entirely in a sim VST software DAW environment. I am attempting the ISP Hum Extractor + Decimator G routing with the following hardware and software: 1. [ISP Hum Extractor + Decimator](https://www.manualslib.com/manual/2066172/Isp-Technologies-Hum-Extractor-Plusdecimator-G.html?page=3#manual) ![ISP](https://us1.discourse-cdn.com/flex020/uploads/neuraldsp/original/2X/7/730da59f6388215893f08bb5597f505dbf7e4577.jpeg) ![Screenshot 2025-04-10 at 20.04.22](https://us1.discourse-cdn.com/flex020/uploads/neuraldsp/original/2X/1/18d4fae19d1de3df3b0c5b09b1746e007beed420.jpeg) In this taken from the manual example configuration the HUM is eliminated in the signal between the guitar and the input of the pedal chain and the **DECIMATOR** is in the signal path after the preamplifier of the guitar amplifier. This allows the **DECIMATOR** to remove all noise introduced at any point in the signal path and will not require any threshold change when switching from high gain to clean tones. NOTE: when using longer time based effects like echo, delay and reverb it is best to insert these effects after the output of channel 2 to avoid cutting off reverb tails or echo spillover. For that reason I am using two **NDSP** sim plugin split in half (twice). In the first instance I am using only the effects and the amp part of the plugin and in the second instance I am using only the time based effects of the plugin. 1. [Radial J48 DI Box](https://www.radialeng.com/wp-content/uploads/2018/03/J48-Manual-WEB-01-22.pdf) (Input / Output / Thru) 2. [Radial EXTC SA Reamp Box](https://www.radialeng.com/wp-content/uploads/2018/04/EXTC-SA-Manual-web-08-2021-1.pdf) (Input / Output / EFX Loop A / EFX Loop B / 2 x Send / 2 X Receive) 3. [Focusrite Clarett+8Pre](https://fael-downloads-prod.focusrite.com/customer/prod/s3fs-public/focusrite/downloads/32409/clarett-8preusb-user-guidev1.1.pdf) USB Interface (10 Inputs / 12 Outputs) 4. Logic Pro or Reaper 5. NDSP plugins ![Logic + Focusrite + ISP](https://us1.discourse-cdn.com/flex020/uploads/neuraldsp/original/2X/f/f7d8f7d4002d43806307cec6086098f2c04ea4fa.jpeg) ![20250410_161137](https://us1.discourse-cdn.com/flex020/uploads/neuraldsp/original/2X/c/cc218751c932d62a30e31156a663a4b5d5b8cb72.jpeg) I have tried using the dedicated in my DAWs (Logic Pro or Reaper) I/O and ReaInsert utilities that serve as digital patch bay allowing us to integrate external audio effects similar to using internal VST sim effects. I have failed to understand sufficiently the information in the manuals and route properly in order to make it work. I am lost, so if you can, please HELP with “Routing for DUMMIES” style explanation. 🤟 😈 🎸 ---
**Author:** ![Zak](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/zak/32/5194_2.png) [@Zak](https://unity.neuraldsp.com/u/Zak)\ **Post date:** [April 13, 2025, 4:36pm UTC](https://unity.neuraldsp.com/t/ndsp-plugins-using-external-effects-in-the-routing/17842/2 "2025-04-13T16:36:00Z")
Problem solved thanks to the **Thomann Customer Support**. I’ve reached out to Radial, Focusrite and ISP, but **Thomann** were the only one to write back with instant **GERMAN** solution to my problem. ![ISP_Hum_Extractor_+_Decimator_G](https://us1.discourse-cdn.com/flex020/uploads/neuraldsp/original/2X/8/86ce68f5f2ff1c3eb11c6f82e9d74f96f3de67a6.jpeg) ---
**Author:** ![jackattack](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/jackattack/32/2608_2.png) [@jackattack](https://unity.neuraldsp.com/u/jackattack)\ **Post date:** [April 14, 2025, 2:48pm UTC](https://unity.neuraldsp.com/t/ndsp-plugins-using-external-effects-in-the-routing/17842/3 "2025-04-14T14:48:17Z")