Duckulaj
Posts: 5
Joined: Mon Oct 17, 2016 11:15 pm

Background Interference with IQAudioDAC

Tue Jan 21, 2020 10:51 pm

Code: Select all

mediapi4
    description: ARMv7 Processor rev 3 (v7l)
    product: Raspberry Pi 4 Model B Rev 1.1
    serial: 10000000169bfe8d
    width: 32 bits
    capabilities: smp
  *-core
       description: Motherboard
       physical id: 0
     *-cpu:0
          description: CPU
          product: cpu
          physical id: 1
          bus info: cpu@0
          size: 1800MHz
          capacity: 1800MHz
          capabilities: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 cpufreq
     *-cpu:1
          description: CPU
          product: cpu
          physical id: 2
          bus info: cpu@1
          size: 1800MHz
          capacity: 1800MHz
          capabilities: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 cpufreq
     *-cpu:2
          description: CPU
          product: cpu
          physical id: 3
          bus info: cpu@2
          size: 1800MHz
          capacity: 1800MHz
          capabilities: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 cpufreq
     *-cpu:3
          description: CPU
          product: cpu
          physical id: 4
          bus info: cpu@3
          size: 1800MHz
          capacity: 1800MHz
          capabilities: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 cpufreq
     *-memory
          description: System memory
          physical id: 5
          size: 3918MiB
     *-pci
          description: PCI bridge
          product: Broadcom Limited
          vendor: Broadcom Limited
          physical id: 0
          bus info: pci@0000:00:00.0
          version: 10
          width: 32 bits
          clock: 33MHz
          capabilities: pci pm pciexpress normal_decode bus_master cap_list
          configuration: driver=pcieport
          resources: irq:52 memory:600000000-6000fffff
        *-usb
             description: USB controller
             product: VL805 USB 3.0 Host Controller
             vendor: VIA Technologies, Inc.
             physical id: 0
             bus info: pci@0000:01:00.0
             version: 01
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress xhci bus_master cap_list
             configuration: driver=xhci_hcd latency=0
             resources: irq:53 memory:600000000-600000fff
           *-usbhost:0
                product: xHCI Host Controller
                vendor: Linux 4.19.93-v7l+ xhci-hcd
                physical id: 0
                bus info: usb@1
                logical name: usb1
                version: 4.19
                capabilities: usb-2.00
                configuration: driver=hub slots=1 speed=480Mbit/s
              *-usb
                   description: USB hub
                   product: USB2.0 Hub
                   vendor: VIA Labs, Inc.
                   physical id: 1
                   bus info: usb@1:1
                   version: 4.20
                   capabilities: usb-2.10
                   configuration: driver=hub maxpower=100mA slots=4 speed=480Mbit/s
           *-usbhost:1
                product: xHCI Host Controller
                vendor: Linux 4.19.93-v7l+ xhci-hcd
                physical id: 1
                bus info: usb@2
                logical name: usb2
                version: 4.19
                capabilities: usb-3.00
                configuration: driver=hub slots=4 speed=5000Mbit/s
              *-usb:0
                   description: Mass storage device
                   product: Flash Drive
                   vendor: Samsung
                   physical id: 1
                   bus info: usb@2:1
                   logical name: scsi1
                   version: 11.00
                   serial: 0374019070016992
                   capabilities: usb-3.10 scsi emulated
                   configuration: driver=usb-storage maxpower=304mA speed=5000Mbit/s
                 *-disk
                      description: SCSI Disk
                      product: Flash Drive
                      vendor: Samsung
                      physical id: 0.0.0
                      bus info: scsi@1:0.0.0
                      logical name: /dev/sdb
                      version: 1100
                      serial: AA00000000000489
                      size: 119GiB (128GB)
                      capabilities: removable
                      configuration: ansiversion=6 logicalsectorsize=512 sectorsize=512
                    *-medium
                         physical id: 0
                         logical name: /dev/sdb
                         size: 119GiB (128GB)
                         capabilities: partitioned partitioned:dos
                         configuration: signature=d34db33f
                       *-volume:0
                            description: Windows FAT volume
                            vendor: mkfs.fat
                            physical id: 1
                            logical name: /dev/sdb1
                            logical name: /media/pi/boot
                            version: FAT32
                            serial: 9f2d-0578
                            size: 255MiB
                            capacity: 256MiB
                            capabilities: primary fat initialized
                            configuration: FATs=2 filesystem=fat label=boot mount.fstype=vfat mount.options=rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,showexec,utf8,flush,errors=remount-ro state=mounted
                       *-volume:1
                            description: EXT4 volume
                            vendor: Linux
                            physical id: 2
                            logical name: /dev/sdb2
                            version: 1.0
                            serial: efc2ea8b-042f-47f5-953e-577d8860de55
                            size: 119GiB
                            capacity: 119GiB
                            capabilities: primary journaled extended_attributes large_files dir_nlink recover extents ext4 ext2 initialized
                            configuration: created=2019-09-26 01:44:35 filesystem=ext4 label=rootfs lastmountpoint=/ modified=2019-09-26 01:46:04 mounted=2020-01-20 00:36:08 state=clean
              *-usb:1
                   description: Mass storage device
                   product: Elements 25A3
                   vendor: Western Digital
                   physical id: 2
                   bus info: usb@2:2
                   logical name: scsi0
                   version: 10.13
                   serial: 574343344D34535255353950
                   capabilities: usb-3.00 scsi emulated
                   configuration: driver=usb-storage maxpower=8mA speed=5000Mbit/s
                 *-disk
                      description: SCSI Disk
                      product: Elements 25A3
                      vendor: WD
                      physical id: 0.0.0
                      bus info: scsi@0:0.0.0
                      logical name: /dev/sda
                      version: 1013
                      serial: WCC4M4SRU59P
                      size: 1862GiB (2TB)
                      capabilities: gpt-1.00 partitioned partitioned:gpt
                      configuration: ansiversion=6 guid=c3a1c680-c9be-4a88-8c71-2431ed103bbc logicalsectorsize=512 sectorsize=512
                    *-volume
                         description: EXT4 volume
                         vendor: Linux
                         physical id: 1
                         bus info: scsi@0:0.0.0,1
                         logical name: /dev/sda1
                         logical name: /home/pi/media
                         version: 1.0
                         serial: 1aaf466c-efcc-4aa1-ac83-eabb1edc720e
                         size: 1862GiB
                         capabilities: journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
                         configuration: created=2019-07-31 18:59:25 filesystem=ext4 label=media lastmountpoint=/home/pi/media modified=2020-01-20 00:36:14 mount.fstype=ext4 mount.options=rw,relatime mounted=2020-01-20 00:36:14 name=media state=mounted
  *-network:0
       description: Ethernet interface
       physical id: 1
       logical name: eth0
       serial: dc:a6:32:04:37:44
       size: 1Gbit/s
       capacity: 1Gbit/s
       capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=bcmgenet driverversion=v2.0 duplex=full ip=192.168.1.154 link=yes multicast=yes port=MII speed=1Gbit/s
  *-network:1
       description: Wireless interface
       physical id: 2
       logical name: wlan0
       serial: dc:a6:32:04:37:45
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=brcmfmac driverversion=7.45.154 firmware=01-4fbe0b04 ip=192.168.1.155 multicast=yes wireless=IEEE 802.11

Code: Select all

**** List of PLAYBACK Hardware Devices ****
card 0: IQaudIODAC [IQaudIODAC], device 0: IQaudIO DAC HiFi pcm512x-hifi-0 [IQaudIO DAC HiFi pcm512x-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
**** List of PLAYBACK Hardware Devices ****
card 0: IQaudIODAC [IQaudIODAC], device 0: IQaudIO DAC HiFi pcm512x-hifi-0 [IQaudIO DAC HiFi pcm512x-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
When I am performing any wifi activity or disk activity I can hear audible interference through my speakers attached to the IQAudioDAC.

I have folllowed the setup instructions for the IQAudioDAC including the dy_param change to use the IQAudioDac.

Any assistance in troubleshooting this issue would be appreciated.

dustnbone
Posts: 166
Joined: Tue Nov 05, 2019 2:49 am

Re: Background Interference with IQAudioDAC

Tue Jan 21, 2020 11:52 pm

Most likely it's being picked up by the cables connecting the DAC output to the speaker inputs. Try moving them as to minimize the amount of them that's near the Pi. Next step is better shielded cables.

LTolledo
Posts: 2590
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: Background Interference with IQAudioDAC

Wed Jan 22, 2020 9:04 am

the RPi and the powered speakers sharing the same 5v power source (or is plugged to the RPi)?
am assuming powered USB speakers due to lack of additional information on the audio amplification side.
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

Duckulaj
Posts: 5
Joined: Mon Oct 17, 2016 11:15 pm

Re: Background Interference with IQAudioDAC

Wed Jan 22, 2020 11:40 am

Yes, the speakers are USB powered. Plugged the USB lead into my RPI3, just for power, and now no interference noise.

Thanks for the pointers !

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