With what browser? There is a known bug with audio in Firefox 52 and later, but Chrome/Chromium should work just fine.
The machine is my Dell Inspiron 15" 7559 Laptop. I haven't found any other problems.
Any suggestions?
Code:root@Microknoppix:/home/knoppix# inxi -Fxz System: Host: Microknoppix Kernel: 4.7.9-64 x86_64 (64 bit gcc: 6.2.0) Desktop: N/A Distro: Debian GNU/Linux stretch/sid Machine: System: Dell (portable) product: Inspiron 7559 v: 1.2.2 Mobo: Dell model: 0H0CC0 v: A00 UEFI: Dell v: 1.2.2 date: 01/22/2017 Battery BAT0: charge: 20.0 Wh 32.9% condition: 60.8/64.9 Wh (94%) model: SIMPLO Dell status: Discharging CPU: Quad core Intel Core i7-6700HQ (-HT-MCP-) cache: 6144 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 20747 clock speeds: max: 2500 MHz 1: 1100 MHz 2: 1099 MHz 3: 1099 MHz 4: 1100 MHz 5: 1099 MHz 6: 1326 MHz 7: 2600 MHz 8: 1735 MHz Graphics: Card-1: Intel HD Graphics 530 bus-ID: 00:02.0 Card-2: NVIDIA GM107M [GeForce GTX 960M] bus-ID: 02:00.0 Display Server: X.org 1.18.4 drivers: (unloaded: fbdev,vesa) tty size: 80x24 Advanced Data: N/A for root Audio: Card Intel Sunrise Point-H HD Audio driver: snd_hda_intel bus-ID: 00:1f.3 Sound: Advanced Linux Sound Architecture v: k4.7.9-64 Network: Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller driver: r8169 v: 2.3LK-NAPI port: d000 bus-ID: 04:00.0 IF: eth0 state: down mac: <filter> Card-2: Intel Wireless 3165 driver: iwlwifi bus-ID: 05:00.0 IF: wlan0 state: up mac: <filter> Card-3: Atmel usb-ID: 001-004 IF: null-if-id state: N/A speed: N/A duplex: N/A mac: N/A Drives: HDD Total Size: 1260.4GB (3.6% used) ID-1: /dev/sda model: MTFDDAV256MBF size: 256.1GB temp: 51C ID-2: /dev/sdb model: ST1000LM014 size: 1000.2GB temp: 36C ID-3: USB /dev/sdc model: UDisk size: 4.1GB temp: 0C ID-1: swap-1 size: 4.29GB used: 0.00GB (0%) fs: swap dev: /dev/zram0 ID-2: swap-2 size: 32.00GB used: 0.00GB (0%) fs: swap dev: /dev/sdb6 Sensors: System Temperatures: cpu: 35.0C mobo: 27.8C Fan Speeds (in rpm): cpu: N/A Info: Processes: 253 Uptime: 1:48 Memory: 726.0/15915.6MB Init: SysVinit runlevel: 5 Gcc sys: 6.2.0 Client: Shell (bash 4.4.01) inxi: 2.3.1 root@Microknoppix:/home/knoppix#
With what browser? There is a known bug with audio in Firefox 52 and later, but Chrome/Chromium should work just fine.
I haven't done anything with Knoppix 8.0 since then, and wasn't aware of the bug. I will give that a try next time I fire up that machine.
Thanks for replying...

Gigabyte 4U AI Server 10x Nvidia GPU 2x Xeon Gold 6150 36 Core 2.7GHz DDR4 RAM
$1625.00
Dell EMC PowerEdge R440 Xeon silver 4215 2.5GHz 16 GB ram 2x 550W PSU No HDD
$275.00
867959-B21 HPE ProLiant DL360 G10 CTO Server W/ 2x 865414-B21 1x 840140-001
$245.00
Dell PowerEdge R530 2x E5-2630v4 H330 iDRAC8 Port Card Riser No PSU/RAM/HDD
$99.99
Dell PowerEdge C4130 1U AI GPU Server | 2x E5-2680 v3 | 32gb Ram | 2x 1600W
$409.99
Dell PowerEdge R730XD 28 Core Server 2X Xeon E5-2680 V4 H730 32GB RAM No HDD
$378.93
Dell Poweredge R730xd 12LFF 2*2660v4 4*1Gbe h730 2x 750W Server CTO
$308.00
Dell PowerEdge C4130 1U AI GPU Server | 2x E5-2690 v3 | 64gb Ram | 2x 1600W
$524.99
Microsoft Windows Server 2025 Standard 64Bit 16 Core-50 CALs DVD With Key Sealed
$94.95
Dell PowerEdge FX2s + 8x FC430 Blades 16x E5-2630v4 160 Cores Rails No PSU/RAM
$699.00