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Field recorded interviews with the best in bluegrass. Hosted by Daniel Mullins.
Episodes

Aug 14, 2026
Aug 14, 2026
55 min
Mark Rader was the lead vocalist and guitarist of The Traditional Grass, one of the foremost bluegrass bands on the festival circuit in the 80's and 90's. In this episode of Walls of Time, Mark shares great tales from the road, tells us what Kathy Bates film inspired one of the band's biggest hits, and discusses the band's decision to get off the road in 1995. He also lets us know what bands in today's bluegrass scene really fire him up!
Let's return to Mark's dining room table for Part Two of our conversation with Daniel's "Uncle" Mark Rader.
This episode is brought to you by the following sponsors:
-- Greene County Public Library: greenelibrary.info
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)

Aug 11, 2026
Aug 11, 2026
1 hr 23 min
The Traditional Grass was one of the premiere bluegrass bands of the '80s and 90s. Originating in the Miami Valley, they developed a strong reputation and a national following, releasing four albums for Rebel Records before disbanding in 1995. Daniel sits down to chat with the band's guitarist and lead vocalist, Mark Rader, who formed The Traditional Grass alongside Daniel's papaw and dad: Paul "Moon Mullins and Joe Mullins.
Gathered around his dining room table, Mark shares stories about growing up in Middletown and coming of age in southwestern Ohio during such an exciting time for the region's bluegrass scene. He recounts how The Traditional Grass was founded in 1983 and breaks down the excitement behind writing one of their signature songs, "The Blues Are Still The Blues." Mark is a great storyteller and is a lover of roots music. We get him to break down some his favorites artists, from Larry Sparks to Lonnie Mack!
Enjoy Part 1 of our conversation with Mark Rader.
This episode is brought to you by the following sponsors:
-- Greene County Public Library: greenelibrary.info
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)

Jul 31, 2026
Jul 31, 2026
1 hr 20 min
Larry Sparks is truly one of one. We return to the Sparks home in eastern Indiana for the second half of our conversation with the "Youngest of the Old Timers".
We chat with Larry about some of his biggest songs and albums, and we learn about why he turned down some opportunities in the late-80's. He also opens up about his faith and the love of his life, Pam Sparks.
Enjoy Part 2 of our conversation with Larry Sparks.
This episode is brought to you by the following sponsors:
-- Greene County Public Library: greenelibrary.info
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)

Jul 24, 2026
Jul 24, 2026
1 hr 33 min
There is no one like Larry Sparks. A member of the Bluegrass Music Hall of Fame, he is a large part of the "Industrial Strength Bluegrass" story. As we dive into the history of southwestern Ohio bluegrass, we visited with Larry Sparks at his home in eastern Indiana.
Larry Sparks talks growing up in the Miami Valley and vividly recalls the first time he sang in church as youngster. We learn about his time with The Stanley Brothers, about him being asked to join Ralph Stanley & The Clinch Mountain Boys, and what made him strike out on his own to form Larry Sparks & The Lonesome Ramblers. (He also bemoans the retirement of his flip phone.)
Enjoy Part 1 of our conversation with Larry Sparks.
This episode is brought to you by the following sponsors:
-- Greene County Public Library: greenelibrary.info
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)

Jul 10, 2026
Jul 10, 2026
1 hr 16 min
In this second episode of our "Industrial Strength Bluegrass" season of Walls of Time, we pick back up with Fred Bartenstein at his home in Yellow Springs, OH. Fred was about to share "the quintessential Carlton Haney story" (trust us, you have to hear it!).
Fred also discusses working in New York City with the Greenbriar Boys and the time he spent in the Big Apple with Joe & Lily Isaacs. He also shares fascinating stories about his publications on Joe Wilson and Uncle Josh Graves. Fred's "bluegrass spotlights" analysis of the genre will change the way you view our musical genre, and of course, we chat more about "Industrial Strength Bluegrass."
Enjoy Part 2 of our conversation with Fred Bartenstein, who truly is a "bluegrass guru.".
This episode is brought to you by the following sponsors:
-- Greene County Public Library: greenelibrary.info
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)

Jul 3, 2026
Jul 3, 2026
1 hr 48 min
In this inaugural episode of our "Industrial Strength Bluegrass" season of Walls of Time, we sit down with Fred Bartenstein at his home in Yellow Springs, OH. Fred is one of the editors of the book Industrial Strength Bluegrass: Southwestern Ohio's Musical Legacy for University of Illinois Press, so he had to be our first guest this season. We start off our conversation, by learning what exactly is "industrial strength bluegrass", where did the title originate, and why does it refer to bluegrass music connected to the Dayton/Cincinnati region.
Fred truly is a "bluegrass guru." His multi-faceted career in this music began as a teenager. For six decades, he has worn many hats, including guitar player, radio broadcaster, newspaper editor, scholar, festival emcee, author, educator, and more. His work in bluegrass began in a big way as a young man, becoming the right hand man for Carlton Haney, known as the "P.T. Barnum of Bluegrass Music", and he tells us all about it! (Yes -- I ask about Pythagoras.) Enjoy Part 1 of our conversation with Fred Bartenstein.
This episode is brought to you by the following sponsors:
-- Greene County Public Library: greenelibrary.info
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)

Jul 1, 2026
Jul 1, 2026
7 min
Season 4 is almost here! Catch this exclusive sneak peek of our first "themed" season of Walls of Time: Bluegrass Podcast. We will be diving deep into the stories of "industrial strength bluegrass", learning more about southwestern Ohio's impact on bluegrass history.
This special season of Walls of Time is brought to you by the Greene County Public Libraries of Greene County, OH. Learn more at greenelibrary.info

Oct 3, 2023
Oct 3, 2023
1 hr 28 min

In Part Two of our conversation with Ken Irwin & Marian Leighton Levy, we continue diving in to the fifty-plus year history of Rounder Records, which they helped found alongside Bill Nowlin. They tell us why J.D. Crowe & The New South's 1975 release (Rounder 0044) was so pivotal for the aspiring label (and so unlikely as well). Ken also takes us to the exact moment he first heard the voice of Alison Krauss of the Bluegrass Music Hall of Fame, and we learn more about her rise as one of the most celebrated vocalists in American roots music history. Ken & Marian also share some of their pick hits from the Rounder catalog, and we put Ken's knowledge of the label's stock numbers to the test. Enjoy the second half of our in-depth conversation with this pair of Rounders (and Bluegrass Music Hall of Famers), Ken Irwin & Marian Leighton Levy!
Be sure to check out the new book on the history of Rounder Records, written by David Menconi, 'Oh, Didn't They Ramble.' Click here to learn more!
This episode is brought to you by the following sponsors:
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)
-- LawnChair USA: lawnchairusa.com/wallsoftime (Use code WALLSOFTIME to save 10%.)
-- Best Self Co: bestself.co (Use code BLUEGRASS to save 15%)

Sep 26, 2023
Sep 26, 2023
2 hr 20 min

The story of Rounder Records is one of the most unlikely success stories in American roots music. Two of the historic record label's three founders, Ken Irwin & Marian Leighton Levy join us to tell the tale in this extensive, in-depth, two-part interview. We learn how this set of outlaw romantics journeyed from the counter-culture to the Bluegrass Music Hall of Fame, and learn many lessons along the way, like the importance of "knowing that you don't know" and how to travel across the entire country on only eleven cents! Enjoy the first part of our conversation with this legendary pair of Rounders.
Be sure to check out the new book on the history of Rounder Records, written by David Menconi, 'Oh, Didn't They Ramble.' Click here to learn more!
This episode is brought to you by the following sponsors:
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)
-- LawnChair USA: lawnchairusa.com/wallsoftime (Use code WALLSOFTIME to save 10%.)
-- Best Self Co: bestself.co (Use code BLUEGRASS to save 15%)

Sep 15, 2023
Sep 15, 2023
1 hr 40 min
Jeremy & Corrina Stephens are truly old souls. They both seek a deeper understanding of their shared passions: traditional music and their faith. Both are uber-talented multi-instrumentalists with an immense knowledge of the music of early roots music pioneers such as Reno & Smiley, Jim & Jesse, The Chuck Wagon Gang, Charlie Monroe, Fred Rose, and more, which is evident in the style of bluegrass they create with their band, High Fidelity. It was a treat to sit down for a visit at the Coffee Hub in Xenia, OH with this wonderful folks, as we chatted about everything from Corrina's love of punk rock to Jeremy's analysis of canned tuna! Enjoy!
This episode is brought to you by the following sponsors:
-- Samson's Haircare: samsonshaircare.com (Use code BLUEGRASS to save 10%.)
-- LawnChair USA: lawnchairusa.com/wallsoftime (Use code WALLSOFTIME to save 10%.)
-- Best Self Co: bestself.co (Use code BLUEGRASS to save 15%)
